Kidneys role is to filter waste and toxins from the blood, and maintain the normal balance of fluid and minerals within the body. As pets are getting older, damage to kidney tissues may occur. This process is irreversible, and will lead to further loss of kidney function. Renal dogs may also experience loss of appetite and their caloric intake might decline, which may lead eventually to loss of muscle mass. Hill's nutritionists and veterinarians developed Prescription Diet® k/d®, clinical nutrition to support your dog's kidney function and help sustain muscle mass. In fact, the nutrition of k/d is clinically tested nutrition to improve & lengthen quality of life. •Supports your dog's natural ability to build lean muscle daily •Enhances appetite & increases food intake •Protects vital kidney & heart function INGREDIENTS: Brown Rice, Brewers Rice, Pork Fat, Cracked Pearled Barley, Chicken, Egg Product, Dried Beet Pulp, Whole Grain Sorghum, Corn Gluten Meal, Chicken Liver Flavor, Soybean Oil, Fish Oil, Calcium Carbonate, Lactic Acid, L-Lysine, Pork Liver Flavor, Potassium Chloride, Potassium Citrate, DL-Methionine, vitamins (Vitamin E Supplement, L-Ascorbyl-2-Polyphosphate (source of Vitamin C), Niacin Supplement, Thiamine Mononitrate, Pyridoxine Hydrochloride, Calcium Pantothenate, Riboflavin Supplement, Vitamin A Supplement, Vitamin B12 Supplement, Biotin, Folic Acid, Vitamin D3 Supplement), L-Threonine, Choline Chloride, Iodized Salt, Taurine, Magnesium Oxide, minerals (Ferrous Sulfate, Zinc Oxide, Copper Sulfate, Manganous Oxide, Calcium Iodate, Sodium Selenite), L-Carnitine, L-Tryptophan, Mixed Tocopherols for freshness, Natural Flavors, Beta-Carotene. Nutrient Dry Matter% Protein 15.5% Fat 23.0% Crude Fiber 1.7% Carbohydrate / NFE 54.5% Calcium 0.86% Phosphorous 0.33% Sodium 0.19% Potassium 0.84% Magnesium 0.144% Vitamin C 126 ppm Vitamin E 730 IU/kg Total Omega-3 FA 0.95% *The nutrient in the product after moisture is removed. It is used to make direct comparisons of nutrient profiles with differing moisture contents. 4050 kcal/kg (402 kcal/cup) (An eight fluid oz. measuring cup of Hill's® Prescription Diet® k/d® Canine contains 3.5 oz. by weight.)