I recently purchased a bag of Felidae Platinum (p745) for Nugget at Bow&Wow in Shangri-la. Felidae Platinum is for senior and or overweight cats... and it's organic too! Nugget is not a senior cat yet but he is definitely overweight. I figured that it would be nice for him to try other diet food aside from Royal Canin's Obesity Management. Unfortunately, Nugget does not seem to enjoy his new food :( Or maybe it's working because he is not so interested in eating? Awww. I think we'll have to switch back to Royal Canin again.