Kidneys are important because they remove waste substances from the blood, and maintain the normal balance of fluid and minerals within the body. Once kidney damage occurs, the consequences are usually irreversible. Hills nutritionists and veterinarians developed Prescription Diet k/d, clinical nutrition especially formulated to support your cats kidney health. In fact, k/d is clinically tested nutrition to improve & lengthen quality of life. This irresistible food makes it easier for you to bond with your pet with gently cooked, bite-sized chunks of real chicken & natural ingredients with added vitamins and minerals. This food requires a veterinary prescription. Hill's is updating their Prescription Diet packaging and a portion of the name. With Prescription Diet k/d, the current descriptor is "Renal Health"; in 2015 it will be "Kidney Care". For Cats Benefits Boosts vitality & energy Supports appetite & eating enjoyment Sustains healthy body condition Active Ingredients Water, Pork Liver, Carrots, Chicken, Tuna, Rice, Chicken Fat, Spinach, Corn Starch, Wheat Gluten, Chicken Liver Flavor, Powdered Cellulose, Calcium Lactate, Potassium Alginate, Titanium Dioxide color, Fish Oil, Potassium Citrate, Guar Gum, vitamins (Vitamin E Supplement, Ascorbic Acid (source of vitamin C), Thiamine Mononitrate, Niacin Supplement, Pyridoxine Hydrochloride, Calcium Pantothenate, Vitamin B12 Supplement, Riboflavin Supplement, Biotin, Vitamin D3 Supplement, Folic Acid, Menadione Sodium Bisulfite Complex (source of vitamin K)), Taurine, L-Lysine, Calcium Chloride, Dicalcium Phosphate, Choline Chloride, minerals (Zinc Oxide, Ferrous Sulfate, Manganese Sulfate, Copper Sulfate, Calcium Iodate), DL-Methionine, Sodium Tripolyphosphate, Magnesium Oxide, Beta-Carotene, Calcium Carbonate. Cautions Feed as directed by your veterinarian.