I give Remus a bit of tuna or chicken as a treat. So long as it's plain, it doesn't seem to bother him. (He did get a little sick when he ate half a can of tuna, nawtee cat!) The key is moderation. Too much can be bad! Make sure though that if you give your kitty some tuna or chicken, you don't leave any unnatended! Cats have this habbit of scarfing lol