I have been trying to get my cat's on a grain free diet. I just haven't found anything they like yet. I recently bought a sample bag of Orijin regional red, and they loved it. I then bought the 6lb bag and they gobbled it up. So I buy them the really big bag for like 80 bucks, They won't go near it. Even the neighborhood feral cat won't eat it. The only difference I could find was the bigger bag is vacuum packed. Has anyone else had this problem?. Is there any tasty grain free food out there? All they will eat is Purina. I have spent so much money on foods they won't eat and like a bad mother I give in and give them what they like. I don't want the poor little things to starve. I give them some wet food as a treat; however my vet doesn't want them on wet food at all.