One they recommended was something like [0] which is what I've been using. Works pretty well in that most of the time the cat knows he can't get food from me (though smart enough to know I fill them up and hide them). Adds a little game and great if you'll be out of the house for a while. So there's no longer a bowl for dry food at all, he has to "hunt" for his mice. Though I'm guilty of sometimes giving some bonus food, I think it is a helpful system. I think he'd be all over an autofeeder just like in this story (already have to hide the big dry food bag as he'll get into it).