diff --git a/src/uncategorized/BackwardsCompatibility.tw b/src/uncategorized/BackwardsCompatibility.tw
index bff271af5aae8bc14144c158ce13067725d02524..684db71f33c36f62b7f8ea07fed5d79f89d9b143 100644
--- a/src/uncategorized/BackwardsCompatibility.tw
+++ b/src/uncategorized/BackwardsCompatibility.tw
@@ -793,9 +793,11 @@
 <<if ndef $farmyardLabUpgrades>>
 	<<set $farmyardLabUpgrades = {animalOvaries: 0, animalTesticles: 0, animalMpreg: 0}>>
 <</if>>
-<<if ndef $animalsBought || def $animalsBought>>
-	<<set $animalsBought = {canines: 0, hooved: 0, felines: 0, labradorRetrievers: 0, germanShepherds: 0, goldenRetrievers: 0, frenchBulldogs: 0, bulldogs: 0, beagles: 0, poodles: 0, rottweilers: 0, yorkshireTerriers: 0, siberianHuskies: 0, horses: 0, bulls: 0, pigs: 0, siameses: 0, persians: 0, maineCoons: 0, ragdolls: 0, bengals: 0, abbysinians: 0, birmans: 0, orientalShorthairs: 0, sphynxes: 0, russianBlues: 0, wolves: 0, foxes: 0, jackals: 0, dingos: 0, zebras: 0, cougars: 0, jaguars: 0, pumas: 0, lynx: 0, leopards: 0, lions: 0, tigers: 0}>>
+<<if ndef $animalsBought>>
+	<<set $animalsBought = {}>>
 <</if>>
+<<set _animalsBought = ["canines", "hooved", "felines", "labradorRetrievers", "germanShepherds", "goldenRetrievers", "frenchBulldogs", "bulldogs", "beagles", "poodles", "rottweilers", "yorkshireTerriers", "siberianHuskies", "horses", "bulls", "pigs", "siameses", "persians", "maineCoons", "ragdolls", "bengals", "abbysinians", "birmans", "orientalShorthairs", "sphynxes", "russianBlues", "wolves", "foxes", "jackals", "dingos", "zebras", "cougars", "jaguars", "pumas", "lynx", "leopards", "lions", "tigers"]>>
+<<run _animalsBought.forEach(function(species) { $animalsBought[species] = $animalsBought[species] || 0 ; })>>
 <<if ndef $canines>>
 	<<set $canines = []>>
 <</if>>