Is there such a thing? I usually just free feed, but I have one does that just gets huge when I do that. I've noticed that she doesn't use the wheel either. Is there anyway I can encourage her to use the wheel more, or some other exercise she'll take to more? I've tried the ball on the floor, and she'll just sit there for 20 mintues, not moving. I'm not sure if she's extra smart or extra dumb. How much should she be eating per day?