diff --git a/src/app/pets.coffee b/src/app/pets.coffee
index 18422fffe1..69e6308ec8 100644
--- a/src/app/pets.coffee
+++ b/src/app/pets.coffee
@@ -35,6 +35,7 @@ module.exports.app = (appExports, model) ->
 
     return alert "You don't own that food :\\" if foodIdx is -1
     return alert "You don't own that egg :\\" if eggIdx is -1
+    return alert "You already have that pet." if user.get('items.pets').indexOf("#{egg.name}-#{foodName}") != -1
 
     user.push 'items.pets', egg.name + '-' + foodName
     user.remove 'items.food', foodIdx, 1