Hill's Science Diet Adult Original cat food provides precisely balanced nutrition to maintain vital organ health and lean muscles. Science Diet Adult contains a precise balance of essential nutrients and clinically proven antioxidants to maintain superior overall health and a strong immune system. It also has added taurine to help maintain heart health and controlled phosphorus to maintain kidney health. Helpful Tips - Adjust feeding amounts as necessary to maintain optimal weight. If you are unsure ; ask your veterinarian. - New to this food Mix increasing amounts of your pet's new food with decreasing amounts of the old food over a 7-day period. - Keep fresh water available at all times!