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 Cats 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 cat'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 -Supports your cat's natural ability to build lean muscle daily INGREDIENTS: Water, Chicken, Pork Liver, Carrots, Rice, Rice Starch, Spinach, Chicken Fat, Pea Protein, Chicken Liver Flavor, Powdered Cellulose, Soy Protein Isolate, Fish Oil, Potassium Alginate, Soybean Oil, Calcium Lactate, Calcium Gluconate, Natural Flavor, Choline Chloride, Guar Gum, Potassium Citrate, vitamins (Vitamin E Supplement, Thiamine Mononitrate, L-Ascorbyl-2-Polyphosphate (source of Vitamin C), Niacin Supplement, Pyridoxine Hydrochloride, Calcium Pantothenate, Vitamin B12 Supplement, Riboflavin Supplement, Biotin, Folic Acid, Vitamin D3 Supplement), Taurine, Calcium Chloride, Dicalcium Phosphate, L-Threonine, Potassium Chloride, minerals (Zinc Oxide, Ferrous Sulfate, Copper Sulfate, Manganous Oxide, Calcium Iodate), L-Carnitine, Sodium Tripolyphosphate, Calcium Carbonate. 70 kcal / 2.9 oz (82 g) can Nutrient Dry Matter% Protein 30.0% Fat 24.6% Crude Fiber 2.8% Carbohydrate / NFE 38.0% Calcium 0.77% Phosphorous 0.49% Sodium 0.23% Potassium 1.05% Magnesium 0.059% Taurine 0.41% Vitamin E 7 48 IU/kg Total Omega-3 FA 1.10% *The nutrient in the product after moisture is removed. It is used to make direct comparisons of nutrient profiles with differing moisture contents.