Iams Senior Dog Food keeps your canine"s diet in check. As your dog ages, nutritional requirements change. Maintaining healthy bones and joints is of the utmost importance for healthy, mature years. Iams ProActive Health dog food, 13.3 lb, is formulated with l-carnitine to help your pet burn fat and maintain a health metabolism. Show your older pet just how much you care by providing them with Iams ProActive dog food, Senior Plus, which is complete with antioxidants and helps reduce dental plaque with every crunch.