diff --git a/data/json/harvest.json b/data/json/harvest.json
index 4dae6753ae7f1..e485cb18ea897 100644
--- a/data/json/harvest.json
+++ b/data/json/harvest.json
@@ -534,8 +534,9 @@
     "type": "harvest",
     "entries": [
       { "drop": "meat", "type": "flesh", "mass_ratio": 0.28 },
-      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.05 },
+      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.04 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "bone", "type": "bone", "mass_ratio": 0.15 },
@@ -551,9 +552,10 @@
     "type": "harvest",
     "entries": [
       { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.28 },
-      { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.05 },
+      { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.04 },
       { "drop": "mutant_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "mutant_lung", "type": "offal", "mass_ratio": 0.0035 },
+      { "drop": "mutant_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "mutant_liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "mutant_brain", "type": "offal", "mass_ratio": 0.005 },
       { "drop": "bone", "type": "bone", "mass_ratio": 0.15 },
@@ -568,10 +570,11 @@
     "type": "harvest",
     "entries": [
       { "drop": "meat", "type": "flesh", "mass_ratio": 0.3 },
-      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.03 },
+      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.02 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
       { "drop": "kidney", "type": "offal", "mass_ratio": 0.002 },
@@ -589,9 +592,10 @@
     "type": "harvest",
     "entries": [
       { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.3 },
-      { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.03 },
+      { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.02 },
       { "drop": "mutant_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "mutant_lung", "type": "offal", "mass_ratio": 0.0035 },
+      { "drop": "mutant_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "mutant_liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "mutant_brain", "type": "offal", "mass_ratio": 0.05 },
       { "drop": "mutant_kidney", "type": "offal", "mass_ratio": 0.002 },
@@ -608,10 +612,11 @@
     "//": "drops large stomach",
     "type": "harvest",
     "entries": [
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -629,10 +634,11 @@
     "//": "drops large stomach & pork belly",
     "type": "harvest",
     "entries": [
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.29 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.28 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -651,10 +657,11 @@
     "//": "drops large stomach & pork belly & fur",
     "type": "harvest",
     "entries": [
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.29 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.28 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -674,10 +681,11 @@
     "type": "harvest",
     "entries": [
       { "drop": "meat", "type": "flesh", "mass_ratio": 0.26 },
-      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.05 },
+      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.04 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "bone", "type": "bone", "mass_ratio": 0.15 },
       { "drop": "sinew", "type": "bone", "mass_ratio": 0.00035 },
@@ -692,8 +700,9 @@
     "type": "harvest",
     "entries": [
       { "drop": "meat", "type": "flesh", "mass_ratio": 0.26 },
-      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.05 },
+      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.04 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
@@ -709,11 +718,12 @@
     "//": "drops large stomach",
     "type": "harvest",
     "entries": [
-      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "mutant_lung", "type": "offal", "mass_ratio": 0.0035 },
       { "drop": "mutant_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "mutant_liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "mutant_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "mutant_brain", "type": "offal", "mass_ratio": 0.005 },
       { "drop": "mutant_kidney", "type": "offal", "mass_ratio": 0.002 },
       { "drop": "stomach_large", "scale_num": [ 1, 1 ], "max": 1, "type": "offal" },
@@ -730,7 +740,8 @@
     "type": "harvest",
     "entries": [
       { "drop": "skull_human", "type": "bone", "scale_num": [ 1, 1 ], "max": 1 },
-      { "drop": "mutant_human_flesh", "type": "flesh", "mass_ratio": 0.34 },
+      { "drop": "mutant_human_flesh", "type": "flesh", "mass_ratio": 0.33 },
+      { "drop": "mutant_human_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "hstomach", "scale_num": [ 1, 1 ], "max": 1, "type": "offal" },
       { "drop": "mutant_human_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "bone", "type": "bone", "mass_ratio": 0.15 },
@@ -745,9 +756,10 @@
     "//": "drops large stomach",
     "type": "harvest",
     "entries": [
-      { "drop": "mutant_human_flesh", "type": "flesh", "mass_ratio": 0.34 },
+      { "drop": "mutant_human_flesh", "type": "flesh", "mass_ratio": 0.33 },
       { "drop": "hstomach_large", "scale_num": [ 1, 1 ], "max": 1, "type": "offal" },
       { "drop": "bone", "type": "bone", "mass_ratio": 0.15 },
+      { "drop": "mutant_human_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "mutant_human_marrow", "type": "bone", "mass_ratio": 0.005 },
       { "drop": "mutant_human_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "sinew", "type": "bone", "mass_ratio": 0.00035 },
@@ -761,10 +773,11 @@
     "type": "harvest",
     "entries": [
       { "drop": "demihuman_flesh", "type": "flesh", "mass_ratio": 0.2 },
-      { "drop": "demihuman_meat_scrap", "type": "flesh", "mass_ratio": 0.02 },
+      { "drop": "demihuman_meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "demihuman_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "demihuman_stomach", "scale_num": [ 1, 1 ], "max": 1, "type": "offal" },
       { "drop": "demihuman_liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "demihuman_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "demihuman_lung", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "demihuman_brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "demihuman_sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -781,10 +794,11 @@
     "//": "drops large stomach",
     "type": "harvest",
     "entries": [
-      { "drop": "demihuman_flesh", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "demihuman_flesh", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "demihuman_meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "demihuman_stomach_large", "scale_num": [ 1, 1 ], "max": 1, "type": "offal" },
       { "drop": "demihuman_liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "demihuman_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "demihuman_lung", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "demihuman_brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "demihuman_sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -803,8 +817,9 @@
     "type": "harvest",
     "entries": [
       { "drop": "meat", "type": "flesh", "mass_ratio": 0.28 },
-      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.05 },
+      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.04 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
@@ -820,9 +835,10 @@
     "type": "harvest",
     "entries": [
       { "drop": "meat", "type": "flesh", "mass_ratio": 0.3 },
-      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.03 },
+      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.02 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -841,9 +857,10 @@
     "type": "harvest",
     "entries": [
       { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.3 },
-      { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.03 },
+      { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.02 },
       { "drop": "mutant_lung", "type": "offal", "mass_ratio": 0.0035 },
       { "drop": "mutant_blood", "type": "blood", "mass_ratio": 0.1 },
+      { "drop": "mutant_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "mutant_liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "mutant_brain", "type": "offal", "mass_ratio": 0.005 },
       { "drop": "mutant_kidney", "type": "offal", "mass_ratio": 0.002 },
@@ -860,9 +877,10 @@
     "//": "drops large stomach",
     "type": "harvest",
     "entries": [
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
@@ -881,9 +899,10 @@
     "//": "drops large stomach",
     "type": "harvest",
     "entries": [
-      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "mutant_lung", "type": "offal", "mass_ratio": 0.0035 },
+      { "drop": "mutant_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "mutant_liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "mutant_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "mutant_brain", "type": "offal", "mass_ratio": 0.005 },
@@ -902,8 +921,9 @@
     "type": "harvest",
     "entries": [
       { "drop": "meat", "type": "flesh", "mass_ratio": 0.28 },
-      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.05 },
+      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.04 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
@@ -918,9 +938,10 @@
     "//": "drops large stomach",
     "type": "harvest",
     "entries": [
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
@@ -938,11 +959,12 @@
     "id": "kraken",
     "type": "harvest",
     "entries": [
-      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.37 },
+      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.36 },
       { "drop": "ballast", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "mutant_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "mutant_brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "mutant_kidney", "type": "offal", "mass_ratio": 0.002 },
+      { "drop": "mutant_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "stomach", "scale_num": [ 1, 1 ], "max": 1, "type": "offal" },
       { "drop": "sinew", "type": "bone", "mass_ratio": 0.00035 },
       { "drop": "raw_leather", "type": "skin", "mass_ratio": 0.02 },
@@ -954,11 +976,12 @@
     "//": "drops large stomach",
     "type": "harvest",
     "entries": [
-      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.37 },
+      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.36 },
       { "drop": "ballast", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "mutant_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "mutant_brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "mutant_kidney", "type": "offal", "mass_ratio": 0.002 },
+      { "drop": "mutant_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "stomach_large", "scale_num": [ 1, 1 ], "max": 1, "type": "offal" },
       { "drop": "sinew", "type": "bone", "mass_ratio": 0.0035 },
       { "drop": "raw_leather", "type": "skin", "mass_ratio": 0.02 },
@@ -970,11 +993,12 @@
     "//": "drops large stomach",
     "type": "harvest",
     "entries": [
-      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.37 },
+      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.36 },
       { "drop": "ballast", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "mutant_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "mutant_brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "mutant_kidney", "type": "offal", "mass_ratio": 0.002 },
+      { "drop": "mutant_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "stomach_large", "scale_num": [ 3, 6 ], "max": 6, "type": "offal" },
       { "drop": "sinew", "type": "bone", "mass_ratio": 0.0075 },
       { "drop": "raw_leather", "type": "skin", "mass_ratio": 0.02 },
@@ -987,8 +1011,9 @@
     "type": "harvest",
     "entries": [
       { "drop": "meat", "type": "flesh", "mass_ratio": 0.3 },
-      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.03 },
+      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.02 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
@@ -1007,8 +1032,9 @@
     "type": "harvest",
     "entries": [
       { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.3 },
-      { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.03 },
+      { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.02 },
       { "drop": "mutant_lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "mutant_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "mutant_liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "mutant_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "mutant_brain", "type": "flesh", "mass_ratio": 0.005 },
@@ -1026,9 +1052,10 @@
     "//": "for those vertebrates that don't have something you can skin off of them",
     "type": "harvest",
     "entries": [
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
@@ -1046,9 +1073,10 @@
     "//": "for those vertebrates that don't have something you can skin off of them",
     "type": "harvest",
     "entries": [
-      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "mutant_lung", "type": "offal", "mass_ratio": 0.0035 },
+      { "drop": "mutant_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "mutant_liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "mutant_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "mutant_brain", "type": "offal", "mass_ratio": 0.005 },
@@ -1117,8 +1145,9 @@
     "entries": [
       { "drop": "poultry", "type": "flesh", "mass_ratio": 0.3 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
-      { "drop": "poultry_scrap", "type": "flesh", "mass_ratio": 0.05 },
+      { "drop": "poultry_scrap", "type": "flesh", "mass_ratio": 0.04 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "feather", "type": "skin", "mass_ratio": 0.01 },
       { "drop": "down_feather", "type": "skin", "mass_ratio": 0.005 }
     ]
@@ -1129,7 +1158,8 @@
     "entries": [
       { "drop": "poultry", "type": "flesh", "mass_ratio": 0.3 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
-      { "drop": "poultry_scrap", "type": "flesh", "mass_ratio": 0.03 },
+      { "drop": "poultry_scrap", "type": "flesh", "mass_ratio": 0.02 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "fat", "type": "flesh", "mass_ratio": 0.18 },
       { "drop": "feather", "type": "skin", "mass_ratio": 0.02 },
       { "drop": "down_feather", "type": "skin", "mass_ratio": 0.01 },
@@ -1142,8 +1172,9 @@
     "entries": [
       { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.3 },
       { "drop": "mutant_blood", "type": "blood", "mass_ratio": 0.1 },
-      { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.05 },
+      { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.45 },
       { "drop": "mutant_lung", "type": "offal", "mass_ratio": 0.0035 },
+      { "drop": "mutant_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "mutant_liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "mutant_brain", "type": "offal", "mass_ratio": 0.003 },
       { "drop": "mutant_kidney", "type": "offal", "mass_ratio": 0.002 },
@@ -1159,8 +1190,9 @@
     "entries": [
       { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.3 },
       { "drop": "mutant_blood", "type": "blood", "mass_ratio": 0.1 },
-      { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.03 },
+      { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.02 },
       { "drop": "mutant_lung", "type": "offal", "mass_ratio": 0.0035 },
+      { "drop": "mutant_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "mutant_liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "mutant_brain", "type": "offal", "mass_ratio": 0.003 },
       { "drop": "mutant_kidney", "type": "offal", "mass_ratio": 0.002 },
@@ -2022,9 +2054,10 @@
     "entries": [
       { "drop": "skull_human", "type": "bone", "scale_num": [ 1, 1 ], "max": 1 },
       { "drop": "human_flesh", "type": "flesh", "mass_ratio": 0.2 },
-      { "drop": "human_meat_scrap", "type": "flesh", "mass_ratio": 0.02 },
+      { "drop": "human_meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "hstomach", "scale_num": [ 1, 1 ], "max": 1, "type": "offal" },
       { "drop": "human_liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "human_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "human_lung", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "human_brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "human_sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -2043,11 +2076,12 @@
     "type": "harvest",
     "entries": [
       { "drop": "demihuman_flesh", "type": "flesh", "mass_ratio": 0.2 },
-      { "drop": "demihuman_meat_scrap", "type": "flesh", "mass_ratio": 0.02 },
+      { "drop": "demihuman_meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "demihuman_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "demihuman_stomach", "scale_num": [ 1, 1 ], "max": 1, "type": "offal" },
       { "drop": "demihuman_fat", "type": "flesh", "mass_ratio": 0.1 },
       { "drop": "demihuman_liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "demihuman_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "demihuman_lung", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "demihuman_brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "demihuman_sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -2063,11 +2097,12 @@
     "type": "harvest",
     "entries": [
       { "drop": "demihuman_flesh", "type": "flesh", "mass_ratio": 0.2 },
-      { "drop": "demihuman_meat_scrap", "type": "flesh", "mass_ratio": 0.02 },
+      { "drop": "demihuman_meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "demihuman_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "demihuman_stomach", "scale_num": [ 1, 1 ], "max": 1, "type": "offal" },
       { "drop": "demihuman_liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "demihuman_lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "demihuman_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "demihuman_brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "demihuman_sweetbread", "type": "flesh", "mass_ratio": 0.002 },
       { "drop": "demihuman_kidney", "type": "offal", "mass_ratio": 0.002 },
@@ -2083,8 +2118,9 @@
     "type": "harvest",
     "entries": [
       { "drop": "skull_human", "type": "bone", "scale_num": [ 1, 1 ], "max": 1 },
-      { "drop": "mutant_human_flesh", "type": "flesh", "mass_ratio": 0.2 },
+      { "drop": "mutant_human_flesh", "type": "flesh", "mass_ratio": 0.19 },
       { "drop": "mutant_human_blood", "type": "blood", "mass_ratio": 0.1 },
+      { "drop": "mutant_human_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "hstomach", "scale_num": [ 1, 1 ], "max": 1, "type": "offal" },
       { "drop": "mutant_human_fat", "type": "flesh", "mass_ratio": 0.1 },
       { "drop": "bone_human", "type": "bone", "mass_ratio": 0.12 },
@@ -2098,10 +2134,11 @@
     "type": "harvest",
     "entries": [
       { "drop": "demihuman_flesh", "type": "flesh", "mass_ratio": 0.2 },
-      { "drop": "demihuman_meat_scrap", "type": "flesh", "mass_ratio": 0.02 },
+      { "drop": "demihuman_meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "demihuman_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "demihuman_stomach", "scale_num": [ 1, 1 ], "max": 1, "type": "offal" },
       { "drop": "demihuman_liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "demihuman_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "demihuman_lung", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "demihuman_brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "demihuman_sweetbread", "type": "flesh", "mass_ratio": 0.002 },
diff --git a/data/json/items/comestibles/carnivore.json b/data/json/items/comestibles/carnivore.json
index 5d02f9309ee79..7d39f819a3242 100644
--- a/data/json/items/comestibles/carnivore.json
+++ b/data/json/items/comestibles/carnivore.json
@@ -1038,6 +1038,91 @@
     "snippet_category": "cooked_mutant_lung_desc",
     "delete": { "flags": [ "RAW" ] }
   },
+  {
+    "id": "heart",
+    "type": "COMESTIBLE",
+    "copy-from": "flesh",
+    "looks_like": "offal",
+    "name": { "str": "piece of raw heart", "str_pl": "pieces of raw heart" },
+    "description": "A portion of an animal's heart.  It's tough but not that chewy, and it spoils very quickly.",
+    "weight": "55 g",
+    "volume": "50 ml",
+    "color": "pink",
+    "spoils_in": "1 day",
+    "price_postapoc": "6 cent",
+    "fun": -10,
+    "calories": 67,
+    "vitamins": [ [ "vitC", "3 mg" ], [ "calcium", "2840 μg" ], [ "iron", "2660 μg" ], [ "meat_allergen", 1 ] ],
+    "extend": { "flags": [ "PREDATOR_FUN" ] }
+  },
+  {
+    "id": "human_heart",
+    "type": "COMESTIBLE",
+    "copy-from": "heart",
+    "looks_like": "heart",
+    "name": { "str": "piece of raw human heart", "str_pl": "pieces of raw human heart" },
+    "description": "A portion of heart from a human.  It's tough but not that chewy, and it spoils very quickly.  It appears to have been extracted too crudely to ever be useful as a transplant.",
+    "material": [ "hflesh" ],
+    "vitamins": [ [ "vitC", 0 ], [ "calcium", 3 ], [ "iron", 14 ], [ "meat_allergen", 1 ], [ "human_flesh_vitamin", 1 ] ]
+  },
+  {
+    "id": "demihuman_heart",
+    "type": "COMESTIBLE",
+    "copy-from": "heart",
+    "looks_like": "heart",
+    "name": { "str": "piece of raw demihuman heart", "str_pl": "pieces of raw demihuman heart" },
+    "description": "A portion of heart from a demihuman being.  It's tough but not that chewy, and it spoils very quickly.",
+    "extend": { "flags": [ "STRICT_HUMANITARIANISM" ] }
+  },
+  {
+    "id": "heart_cooked",
+    "type": "COMESTIBLE",
+    "copy-from": "heart",
+    "fun": -5,
+    "looks_like": "offal_cooked",
+    "name": { "str": "cooked piece of heart", "str_pl": "cooked pieces of heart" },
+    "description": "A roasted piece of heart.  It doesn't look any tastier than it did raw, but any parasites are all cooked out.",
+    "parasites": 0,
+    "extend": { "flags": [ "EATEN_HOT" ] },
+    "delete": { "flags": [ "RAW" ] }
+  },
+  {
+    "id": "mutant_heart",
+    "type": "COMESTIBLE",
+    "copy-from": "heart",
+    "name": { "str": "piece of raw mutant heart", "str_pl": "pieces of raw mutant heart" },
+    "snippet_category": "mutant_heart_desc",
+    "fun": -15,
+    "proportional": { "price_postapoc": 0.5 },
+    "extend": { "flags": [ "BAD_TASTE" ] },
+    "vitamins": [ [ "vitC", 0 ], [ "calcium", 3 ], [ "iron", 14 ], [ "mutant_toxin", 10 ], [ "meat_allergen", 1 ] ]
+  },
+  {
+    "id": "mutant_human_heart",
+    "type": "COMESTIBLE",
+    "copy-from": "heart",
+    "name": { "str": "piece of raw mutant humanoid heart", "str_pl": "pieces of raw mutant humanoid heart" },
+    "snippet_category": "mutant_heart_desc",
+    "fun": -15,
+    "proportional": { "price_postapoc": 0.5 },
+    "extend": { "flags": [ "BAD_TASTE" ] },
+    "vitamins": [
+      [ "vitC", 0 ],
+      [ "calcium", 3 ],
+      [ "iron", 14 ],
+      [ "mutant_toxin", 10 ],
+      [ "meat_allergen", 1 ],
+      [ "human_flesh_vitamin", 1 ]
+    ]
+  },
+  {
+    "id": "mutant_heart_cooked",
+    "type": "COMESTIBLE",
+    "copy-from": "heart_cooked",
+    "name": { "str": "cooked piece of mutant heart", "str_pl": "cooked pieces of mutant heart" },
+    "snippet_category": "cooked_mutant_heart_desc",
+    "delete": { "flags": [ "RAW" ] }
+  },
   {
     "id": "mutant_bug_lungs",
     "type": "COMESTIBLE",
diff --git a/data/json/items/comestibles/offal_dishes.json b/data/json/items/comestibles/offal_dishes.json
index be75fb59100f8..5a5b6253a49ff 100644
--- a/data/json/items/comestibles/offal_dishes.json
+++ b/data/json/items/comestibles/offal_dishes.json
@@ -66,6 +66,54 @@
       [ "milk_allergen", 1 ]
     ]
   },
+  {
+    "id": "fried_heart",
+    "type": "COMESTIBLE",
+    "comestible_type": "FOOD",
+    "name": { "str_sp": "fried heart" },
+    "symbol": "%",
+    "looks_like": "meat_cooked",
+    "description": "Tasty deep-fried heart, retaining most of its texture and gaining that delicious fried taste.",
+    "price_postapoc": "50 cent",
+    "material": [ "flesh", "wheat", "milk" ],
+    "primary_material": "flesh",
+    "color": "brown",
+    "weight": "91 g",
+    "volume": "83 ml",
+    "spoils_in": "3 days",
+    "calories": 201,
+    "fun": 6,
+    "quench": -4,
+    "flags": [ "EATEN_HOT" ],
+    "vitamins": [
+      [ "vitC", 0 ],
+      [ "calcium", 2 ],
+      [ "iron", 9 ],
+      [ "meat_allergen", 1 ],
+      [ "wheat_allergen", 1 ],
+      [ "milk_allergen", 1 ]
+    ]
+  },
+  {
+    "id": "stuffed_heart",
+    "type": "COMESTIBLE",
+    "comestible_type": "FOOD",
+    "name": { "str_sp": "stuffed heart" },
+    "symbol": "%",
+    "looks_like": "offal_cooked",
+    "fun": 7,
+    "description": "Chunks of heart filled with vegetables and spices.",
+    "price_postapoc": "41 cent",
+    "material": [ "flesh", "wheat", "veggy" ],
+    "primary_material": "flesh",
+    "color": "brown",
+    "spoils_in": "1 days",
+    "volume": "81 ml",
+    "weight": "89 g",
+    "calories": 400,
+    "flags": [ "EATEN_HOT" ],
+    "vitamins": [ [ "meat_allergen", 1 ], [ "veggy_allergen", 1 ] ]
+  },
   {
     "id": "humble_pie",
     "type": "COMESTIBLE",
@@ -221,6 +269,15 @@
     "sealed": true,
     "container": "can_food"
   },
+  {
+    "id": "canned_heart",
+    "type": "COMESTIBLE",
+    "copy-from": "heart_cooked",
+    "name": { "str_sp": "canned heart" },
+    "description": "Chunks of heart preserved in a can.",
+    "sealed": true,
+    "container": "can_food"
+  },
   {
     "id": "lung_provence",
     "type": "COMESTIBLE",
diff --git a/data/json/recipes/food/canned.json b/data/json/recipes/food/canned.json
index bd790c01ec4ef..879bf724081cd 100644
--- a/data/json/recipes/food/canned.json
+++ b/data/json/recipes/food/canned.json
@@ -822,6 +822,52 @@
       [ [ "liver", 48 ], [ "human_liver", 48 ], [ "demihuman_liver", 48 ] ]
     ]
   },
+  {
+    "type": "recipe",
+    "activity_level": "NO_EXERCISE",
+    "result": "canned_heart",
+    "id_suffix": "jarred",
+    "byproducts": [ [ "water_clean", 2 ] ],
+    "category": "CC_FOOD",
+    "subcategory": "CSC_FOOD_MEAT",
+    "skill_used": "cooking",
+    "difficulty": 5,
+    "time": "30 m",
+    "batch_time_factors": [ 83, 5 ],
+    "using": [ [ "canning_high_heat", 1, "LIST" ] ],
+    "//1": "pressure canning is measured in 0.5 liter quantities, so 1u of canning_high_heat.",
+    "book_learn": [ [ "cookbook", 6 ], [ "manual_canning", 4 ] ],
+    "container": "jar_glass_sealed",
+    "charges": 8,
+    "components": [
+      [ [ "water_clean", 1 ] ],
+      [ [ "jar_glass_sealed", 1 ] ],
+      [ [ "heart", 8 ], [ "human_heart", 8 ], [ "demihuman_heart", 8 ] ]
+    ]
+  },
+  {
+    "type": "recipe",
+    "activity_level": "NO_EXERCISE",
+    "result": "canned_heart",
+    "id_suffix": "jarred_3l",
+    "byproducts": [ [ "water_clean", 12 ] ],
+    "category": "CC_FOOD",
+    "subcategory": "CSC_FOOD_MEAT",
+    "skill_used": "cooking",
+    "difficulty": 5,
+    "time": "60 m",
+    "batch_time_factors": [ 83, 5 ],
+    "using": [ [ "canning_high_heat", 6, "LIST" ] ],
+    "//1": "pressure canning is measured in 0.5 liter quantities, so 6u of canning_high_heat.",
+    "book_learn": [ [ "cookbook", 6 ], [ "manual_canning", 4 ] ],
+    "container": "jar_3l_glass_sealed",
+    "charges": 48,
+    "components": [
+      [ [ "water_clean", 6 ] ],
+      [ [ "jar_3l_glass_sealed", 1 ] ],
+      [ [ "heart", 48 ], [ "human_heart", 48 ], [ "demihuman_heart", 48 ] ]
+    ]
+  },
   {
     "type": "recipe",
     "activity_level": "NO_EXERCISE",
diff --git a/data/json/recipes/food/offal_dishes.json b/data/json/recipes/food/offal_dishes.json
index 81091e8fc96a5..97773a6734f89 100644
--- a/data/json/recipes/food/offal_dishes.json
+++ b/data/json/recipes/food/offal_dishes.json
@@ -45,6 +45,25 @@
     "//": "raw lung weighs 56g, per scrap of meat standard this is 4u heat",
     "components": [ [ [ "mutant_lung", 1 ], [ "mutant_bug_lungs", 1 ] ] ]
   },
+  {
+    "type": "recipe",
+    "activity_level": "LIGHT_EXERCISE",
+    "copy-from": "brain_cooked",
+    "result": "heart_cooked",
+    "qualities": [ { "id": "COOK", "level": 1 } ],
+    "tools": [ [ [ "surface_heat", 4, "LIST" ] ] ],
+    "//": "raw heart weighs 45g, per scrap of meat standard this is 4u heat",
+    "components": [ [ [ "heart", 1 ], [ "human_heart", 1 ], [ "demihuman_heart", 1 ] ] ]
+  },
+  {
+    "type": "recipe",
+    "result": "mutant_heart_cooked",
+    "copy-from": "brain_cooked",
+    "qualities": [ { "id": "COOK", "level": 1 } ],
+    "tools": [ [ [ "surface_heat", 4, "LIST" ] ] ],
+    "//": "raw heart weighs 45g, per scrap of meat standard this is 4u heat",
+    "components": [ [ [ "mutant_heart", 1 ], [ "mutant_human_heart", 1 ] ] ]
+  },
   {
     "type": "recipe",
     "activity_level": "LIGHT_EXERCISE",
@@ -193,6 +212,42 @@
     "components": [ [ [ "flour_any", 20, "LIST" ] ], [ [ "meat_offal", 1, "LIST" ] ], [ [ "water_clean", 1 ] ] ],
     "charges": 3
   },
+  {
+    "type": "recipe",
+    "activity_level": "LIGHT_EXERCISE",
+    "result": "fried_heart",
+    "category": "CC_FOOD",
+    "subcategory": "CSC_FOOD_MEAT",
+    "skill_used": "cooking",
+    "skills_required": [ "survival", 2 ],
+    "time": "7 m",
+    "book_learn": [ [ "cookbook", 1 ] ],
+    "difficulty": 3,
+    "qualities": [ { "id": "CUT", "level": 2 }, { "id": "COOK", "level": 3 } ],
+    "tools": [ [ [ "surface_heat", 11, "LIST" ] ] ],
+    "components": [ [ [ "meat_heart", 1, "LIST" ] ], [ [ "batter", 3, "LIST" ] ], [ [ "fry_oil", 1, "LIST" ] ] ]
+  },
+  {
+    "type": "recipe",
+    "activity_level": "LIGHT_EXERCISE",
+    "result": "stuffed_heart",
+    "category": "CC_FOOD",
+    "subcategory": "CSC_FOOD_MEAT",
+    "skill_used": "cooking",
+    "difficulty": 4,
+    "time": "155 m",
+    "batch_time_factors": [ 85, 4 ],
+    "book_learn": [ [ "offalcooking", 2 ] ],
+    "qualities": [ { "id": "COOK", "level": 3 }, { "id": "CUT", "level": 2 } ],
+    "tools": [ [ [ "surface_heat", 40, "LIST" ] ] ],
+    "components": [
+      [ [ "meat_heart", 4, "LIST" ] ],
+      [ [ "veggy_any_fresh_uncooked", 2, "LIST" ] ],
+      [ [ "any_bread", 2, "LIST" ] ],
+      [ [ "salt", 6 ] ],
+      [ [ "pepper", 6 ] ]
+    ]
+  },
   {
     "type": "recipe",
     "activity_level": "LIGHT_EXERCISE",
diff --git a/data/json/requirements/cooking_components.json b/data/json/requirements/cooking_components.json
index abae6cadc933e..7a08946e481c8 100644
--- a/data/json/requirements/cooking_components.json
+++ b/data/json/requirements/cooking_components.json
@@ -439,6 +439,7 @@
     "//": "Anything you might consider offal or intestines.",
     "components": [
       [
+        [ "meat_heart", 4, "LIST" ],
         [ "meat_lung", 4, "LIST" ],
         [ "meat_liver", 4, "LIST" ],
         [ "meat_kidney", 4, "LIST" ],
@@ -493,6 +494,13 @@
     "//": "Anything you might consider raw lung.  About 250mL of lungs.",
     "components": [ [ [ "lung", 1 ], [ "human_lung", 1 ], [ "demihuman_lung", 1 ], [ "mutant_bug_lungs", 1 ], [ "mutant_lung", 1 ] ] ]
   },
+  {
+    "id": "meat_heart",
+    "type": "requirement",
+    "components": [
+      [ [ "heart", 1 ], [ "human_heart", 1 ], [ "demihuman_heart", 1 ], [ "mutant_heart", 1 ], [ "mutant_human_heart", 1 ] ]
+    ]
+  },
   {
     "id": "meat_liver",
     "type": "requirement",
diff --git a/data/json/snippets/mutant_anatomy.json b/data/json/snippets/mutant_anatomy.json
index 6223607100007..3fce5090cbfba 100644
--- a/data/json/snippets/mutant_anatomy.json
+++ b/data/json/snippets/mutant_anatomy.json
@@ -223,6 +223,50 @@
       }
     ]
   },
+  {
+    "type": "snippet",
+    "category": "mutant_heart_desc",
+    "text": [
+      {
+        "id": "mutant_heart_1",
+        "text": "A chunk of heart from a mutated animal.  Patches of hair and bits of bones are present all over and inside it, making it resemble a giant teratoma.  Despite this, it appears to have functioned as a heart."
+      },
+      {
+        "id": "mutant_heart_2",
+        "text": "A chunk of heart from a mutated animal.  The ventricles are filled with acidic fluids and bits of half-digested food, with the nearby veins and arteries being lined with mucus.  Looking at this macabre fusion of the circulatory and digestive systems, you wonder how such a thing could ever get food to reach the heart without clogging the arteries."
+      },
+      {
+        "id": "mutant_heart_3",
+        "text": "A chunk of heart from a mutated animal.  This cancerous, gangrenous mass of flesh still beats, leaking out more of the foul fluids it used to push through a body.  Beating isn't the only thing it continues to do, as you witness what kept this heart beating: the gangrene eating the cancer as the cancer grows back all over the gangrene, in a sickening ouroboros."
+      },
+      {
+        "id": "mutant_heart_4",
+        "text": "A chunk of heart from a mutated animal.  Despite its stone-like exterior, its inner flesh is much closer to mucus in all aspects.  Upon closer examination, this heart appears vestigial, as the inner flesh turns out to be blood, slowly moving on its own volition."
+      }
+    ]
+  },
+  {
+    "type": "snippet",
+    "category": "cooked_mutant_heart_desc",
+    "text": [
+      {
+        "id": "cooked_mutant_heart_1",
+        "text": "A cooked chunk of heart from a mutated animal.  The removal of most fluid pockets has made what remains of this heart resemble to a mass of tough leather-like scraps, with a far fouler taste."
+      },
+      {
+        "id": "cooked_mutant_heart_2",
+        "text": "A cooked chunk of heart from a mutated animal.  The heat has turned this heart white and mushy, with a taste and texture reminiscent of eating wet ashes."
+      },
+      {
+        "id": "cooked_mutant_heart_3",
+        "text": "A cooked chunk of heart from a mutated animal.  It has partially melted as it cooked, making it gelatinous yet sinewy, as if the taste and odor weren't enough of a deterrent."
+      },
+      {
+        "id": "cooked_mutant_heart_4",
+        "text": "A cooked chunk of heart from a mutated animal.  Most of it has softened under the heat, giving it a rubbery texture and a taste of cold grease, but the core became akin to a meaty jawbreaker with an unsettling but not revolting taste."
+      }
+    ]
+  },
   {
     "type": "snippet",
     "category": "mutant_kidney_desc",
diff --git a/data/mods/Aftershock/mobs/harvest.json b/data/mods/Aftershock/mobs/harvest.json
index f409b2ed97c73..df8ef16e2e254 100644
--- a/data/mods/Aftershock/mobs/harvest.json
+++ b/data/mods/Aftershock/mobs/harvest.json
@@ -22,8 +22,9 @@
     "type": "harvest",
     "entries": [
       { "drop": "meat", "type": "flesh", "mass_ratio": 0.3 },
-      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.03 },
+      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.02 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
diff --git a/data/mods/DinoMod/harvest.json b/data/mods/DinoMod/harvest.json
index 49e60eb27ba66..49ce9599ea4ed 100644
--- a/data/mods/DinoMod/harvest.json
+++ b/data/mods/DinoMod/harvest.json
@@ -7,8 +7,9 @@
       { "drop": "skull_dino_small", "type": "bone", "scale_num": [ 1, 1 ], "max": 1 },
       { "drop": "meat", "type": "flesh", "mass_ratio": 0.3 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
-      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.03 },
+      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.02 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -31,8 +32,9 @@
       { "drop": "skull_dino_pred_small", "type": "bone", "scale_num": [ 1, 1 ], "max": 1 },
       { "drop": "meat", "type": "flesh", "mass_ratio": 0.3 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
-      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.03 },
+      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.02 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -53,10 +55,11 @@
     "type": "harvest",
     "entries": [
       { "drop": "skull_dino_med", "type": "bone", "scale_num": [ 1, 1 ], "max": 1 },
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -77,10 +80,11 @@
     "type": "harvest",
     "entries": [
       { "drop": "skull_dino_med", "type": "bone", "scale_num": [ 1, 1 ], "max": 1 },
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -98,10 +102,11 @@
     "type": "harvest",
     "entries": [
       { "drop": "skull_dino_pred_large", "type": "bone", "scale_num": [ 1, 1 ], "max": 1 },
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -120,10 +125,11 @@
     "type": "harvest",
     "entries": [
       { "drop": "skull_dino_pred_med", "type": "bone", "scale_num": [ 1, 1 ], "max": 1 },
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -144,10 +150,11 @@
     "type": "harvest",
     "entries": [
       { "drop": "skull_dino_pred_large", "type": "bone", "scale_num": [ 1, 1 ], "max": 1 },
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -168,10 +175,11 @@
     "type": "harvest",
     "entries": [
       { "drop": "skull_tyrannosaurus", "type": "bone", "scale_num": [ 1, 1 ], "max": 1 },
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -192,10 +200,11 @@
     "type": "harvest",
     "entries": [
       { "drop": "skull_allosaurus", "type": "bone", "scale_num": [ 1, 1 ], "max": 1 },
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -216,10 +225,11 @@
     "type": "harvest",
     "entries": [
       { "drop": "skull_acrocanthosaurus", "type": "bone", "scale_num": [ 1, 1 ], "max": 1 },
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -240,10 +250,11 @@
     "type": "harvest",
     "entries": [
       { "drop": "skull_giganotosaurus", "type": "bone", "scale_num": [ 1, 1 ], "max": 1 },
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -263,9 +274,10 @@
     "type": "harvest",
     "entries": [
       { "drop": "skull_dino_large", "type": "bone", "scale_num": [ 1, 1 ], "max": 1 },
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
@@ -286,9 +298,10 @@
     "type": "harvest",
     "entries": [
       { "drop": "skull_torosaurus", "type": "bone", "scale_num": [ 1, 1 ], "max": 1 },
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
@@ -309,9 +322,10 @@
     "type": "harvest",
     "entries": [
       { "drop": "skull_styracosaurus", "type": "bone", "scale_num": [ 1, 1 ], "max": 1 },
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
@@ -332,9 +346,10 @@
     "type": "harvest",
     "entries": [
       { "drop": "skull_centrosaurus", "type": "bone", "scale_num": [ 1, 1 ], "max": 1 },
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
@@ -355,9 +370,10 @@
     "type": "harvest",
     "entries": [
       { "drop": "skull_triceratops", "type": "bone", "scale_num": [ 1, 1 ], "max": 1 },
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
diff --git a/data/mods/Magiclysm/harvest.json b/data/mods/Magiclysm/harvest.json
index da43ee1990815..81bcfa5253c30 100644
--- a/data/mods/Magiclysm/harvest.json
+++ b/data/mods/Magiclysm/harvest.json
@@ -4,9 +4,10 @@
     "//": "identical to mammal_large_fur except that half the fur has been replaced with feathers",
     "type": "harvest",
     "entries": [
-      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -27,8 +28,9 @@
     "type": "harvest",
     "entries": [
       { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.3 },
-      { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.03 },
+      { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.02 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -47,9 +49,10 @@
     "//": "drops large stomach",
     "type": "harvest",
     "entries": [
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -81,8 +84,9 @@
     "type": "harvest",
     "entries": [
       { "drop": "meat", "type": "flesh", "mass_ratio": 0.28 },
-      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.05 },
+      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.04 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "bone", "type": "bone", "mass_ratio": 0.15 },
@@ -97,9 +101,10 @@
     "//": "vanilla override, includes adrenal gland",
     "type": "harvest",
     "entries": [
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -117,10 +122,11 @@
     "//": "vanilla override, includes adrenal gland",
     "type": "harvest",
     "entries": [
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
       { "drop": "kidney", "type": "offal", "mass_ratio": 0.002 },
@@ -137,9 +143,10 @@
     "//": "drops large stomach",
     "type": "harvest",
     "entries": [
-      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -157,9 +164,10 @@
     "//": "drops large stomach",
     "type": "harvest",
     "entries": [
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -178,8 +186,9 @@
     "type": "harvest",
     "entries": [
       { "drop": "meat", "type": "flesh", "mass_ratio": 0.28 },
-      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.05 },
+      { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.04 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
@@ -194,9 +203,10 @@
     "//": "drops large stomach",
     "type": "harvest",
     "entries": [
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -227,9 +237,10 @@
     "//": "for those vertebrates that don't have something you can skin off of them",
     "type": "harvest",
     "entries": [
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -246,9 +257,10 @@
     "//": "for those vertebrates that don't have something you can skin off of them",
     "type": "harvest",
     "entries": [
-      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "mutant_meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "mutant_meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -309,8 +321,9 @@
     "id": "lizardfolk",
     "type": "harvest",
     "entries": [
-      { "drop": "demihuman_flesh", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "demihuman_flesh", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "demihuman_lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "demihuman_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "demihuman_liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "demihuman_brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "demihuman_kidney", "type": "offal", "mass_ratio": 0.002 },
@@ -324,10 +337,11 @@
     "//": "taken from mutant flightless bird but with demihuman meat and organs",
     "type": "harvest",
     "entries": [
-      { "drop": "demihuman_flesh", "type": "flesh", "mass_ratio": 0.3 },
+      { "drop": "demihuman_flesh", "type": "flesh", "mass_ratio": 0.29 },
       { "drop": "demihuman_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "demihuman_meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "demihuman_lung", "type": "offal", "mass_ratio": 0.0035 },
+      { "drop": "demihuman_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "demihuman_liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "demihuman_brain", "type": "offal", "mass_ratio": 0.003 },
       { "drop": "demihuman_kidney", "type": "offal", "mass_ratio": 0.002 },
@@ -342,9 +356,10 @@
     "id": "ogre",
     "type": "harvest",
     "entries": [
-      { "drop": "demihuman_flesh", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "demihuman_flesh", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "demihuman_lung", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "demihuman_liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "demihuman_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "demihuman_brain", "type": "flesh", "mass_ratio": 0.0025 },
       { "drop": "demihuman_kidney", "type": "offal", "mass_ratio": 0.002 },
       { "drop": "raw_demihumanleather", "type": "skin", "mass_ratio": 0.02 },
@@ -356,9 +371,10 @@
     "id": "orc",
     "type": "harvest",
     "entries": [
-      { "drop": "demihuman_flesh", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "demihuman_flesh", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "demihuman_lung", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "demihuman_liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "demihuman_heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "demihuman_brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "demihuman_kidney", "type": "offal", "mass_ratio": 0.002 },
       { "drop": "raw_demihumanleather", "type": "skin", "mass_ratio": 0.02 },
diff --git a/data/mods/Megafauna/harvest.json b/data/mods/Megafauna/harvest.json
index 0ad2c7c226a40..c0397b81db055 100644
--- a/data/mods/Megafauna/harvest.json
+++ b/data/mods/Megafauna/harvest.json
@@ -4,10 +4,11 @@
     "//": "drops large stomach, tusks and mammoth wool",
     "type": "harvest",
     "entries": [
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -28,10 +29,11 @@
     "//": "drops large stomach, mammoth wool, but no tusks",
     "type": "harvest",
     "entries": [
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -49,10 +51,11 @@
     "//": "drops large stomach, tusks",
     "type": "harvest",
     "entries": [
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },
@@ -72,9 +75,10 @@
     "//": "drops large stomach, shell",
     "type": "harvest",
     "entries": [
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
@@ -95,9 +99,10 @@
     "//": "drops large stomach, large bones, pelts",
     "type": "harvest",
     "entries": [
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
@@ -117,10 +122,11 @@
     "//": "drops large stomach, large bones, leather",
     "type": "harvest",
     "entries": [
-      { "drop": "meat", "type": "flesh", "mass_ratio": 0.32 },
+      { "drop": "meat", "type": "flesh", "mass_ratio": 0.31 },
       { "drop": "meat_scrap", "type": "flesh", "mass_ratio": 0.01 },
       { "drop": "lung", "type": "flesh", "mass_ratio": 0.0035 },
       { "drop": "liver", "type": "offal", "mass_ratio": 0.01 },
+      { "drop": "heart", "type": "offal", "mass_ratio": 0.01 },
       { "drop": "animal_blood", "type": "blood", "mass_ratio": 0.1 },
       { "drop": "brain", "type": "flesh", "mass_ratio": 0.005 },
       { "drop": "sweetbread", "type": "flesh", "mass_ratio": 0.002 },