My cats are watching their weight. Not because they want to though. I have fed them IAMS as long as I've had them and now they are on IAMS Less Active. When you think about it, cats sleep about 16-18 hrs. a day, according to what I've read, so that's a pretty inactive day in itself! Occasionally I will let them split a can of Fancy Feast if I'm feeling sorry for depriving them.