The kidneys filter waste and toxins from the blood and maintain the normal balance of fluid and minerals within the body. As pets age, damage to kidney tissues may occur. This process is irreversible and leads to loss of kidney function. Dogs with decreased kidney function may experience loss of appetite and their food intake might decline, which may lead 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. -Protects vital kidney & heart function -Boosts vitality & energy -Supports your dog's natural ability to build lean muscle daily INGREDIENTS: Water, Corn Starch, Pork Liver, Chicken, Chicken Fat, Dextrose, Flaxseed, Chicken Liver Flavor, Dried Beet Pulp, Fish Oil, Powdered Cellulose, Calcium Carbonate, Egg Whites, L-Lysine, Potassium Citrate, Potassium Chloride, Betaine, DL-Methionine, Whole Grain Oats, Choline Chloride, vitamins (Vitamin E Supplement, L-Ascorbyl-2-Polyphosphate (source of Vitamin C), Ascorbic Acid (source of Vitamin C), Thiamine Mononitrate, Niacin Supplement, Vitamin A Supplement, Calcium Pantothenate, Vitamin B12 Supplement, Pyridoxine Hydrochloride, Riboflavin Supplement, Biotin, Menadione Sodium Bisulfite Complex (source of Vitamin K), Folic Acid, Vitamin D3 Supplement), Fructooligosaccharides (FOS), minerals (Ferrous Sulfate, Zinc Oxide, Manganese Sulfate, Copper Sulfate, Calcium Iodate), Magnesium Oxide, L-Threonine, Taurine, Sodium Tripolyphosphate, L-Carnitine, Iodized Salt, L-Tryptophan, Beta-Carotene. Nutrient Dry Matter% Protein 15.7 % Fat 26.1 % Carbohydrate / NFE 49.3 % Crude Fiber 3.5 % Calcium 0.79 % Phosphorus 0.27 % Potassium 0.9 % Sodium 0.18 % Magnesium 0.142 % Vitamin C 143 ppm Vitamin E 748 IU/kg Total Omega-3 FA 2.53 % *The nutrient in the product after moisture is removed. It is used to make direct comparisons of nutrient profiles with differing moisture contents. 433 kcal / 13 oz (370 g) can