I swear if I go anywhere near the treat cupboard door (not possible, because it's next to the pantry doors), he races out to beg. He knows the word "Greenies" which is the name of the treats he gets most. My other kitty, Olive, had learned the word "milk" and that was her thing: she loved a little cream, or the milk in my bowl after cereal. I always said it like Cute Overload did: meeelks, and she got very excited. I really miss that, pouring her a tiny bowl of meelks.