I feed my cats Purina Cat Chow Indoor formula...mainly because they won't eat anything else. I've tried Iams and the better brands but they just don't like it and Iams (when it was eaten) made their poop stink really bad. I would love to be able to afford some of the higher end foods and try them, but right now, I can't afford to spend $30 on a bag of cat food. Maybe after I win the lottery....