Craftlady thanks for the info. I actually switched them over from Science Diet because I wanted a higher quality food. I looked at both, I'd never put them on a diet forumla before. I ended up going with the indoor formula. Corkscrew was a little pudgy but not at all obese. After switching he's lost a little bit of weight but now he looks perfect. However as he gets older he may begin to get larger so it's nice knowing my alternatives.