I voted for Nutro Light Formula. The actual name is Nutro Complete Care Weight Management Formula. It causes less shedding, fewer hairballs, and less vomiting. It also has 30% less fat than the adult formula to help manage your cat's weight. It contains L-Carnitine to help the body burn fat. My cats also love the taste. Here's the link to it: www.nutroproducts.com. Good luck with whatever you decide. BTW I also give my cats Laxa-Stat at least once a week to help control hairballs too.