Prescription Diet® c/d® Canine pet food is specially formulated by nutritionists & veterinarians to help manage the risk of struvite stones in dogs with and is clinically tested nutrition to improve & lengthen quality of life. Controlled levels of Calcium, Magnesium and Phosphorus helps limit the building blocks for formation of struvite & calcium oxalate stones and helps reduce calcium excretion into the urine. Added Potassium Citrate and Glycosaminoglycans reduce inflammation associated with UTI and uroliths and generates an environment unfavorable to the development of uroliths and inhibits calcium oxalate crystals and stones. Ingredients Water, Beef By-Products, Chicken, Rice, Whole Grain Corn, Pork Liver, Powdered Cellulose, Soybean Mill Run, Soybean Oil, Fish Oil, Potassium Citrate, Calcium Sulfate, Potassium Chloride, Choline Chloride, Flaxseed, Iodized Salt, Calcium Carbonate, vitamins (Vitamin E Supplement, Thiamine Mononitrate, Pyridoxine Hydrochloride, Niacin Supplement, Calcium Pantothenate, Vitamin B12 Supplement, Riboflavin Supplement, Biotin, Vitamin D3 Supplement, Folic Acid), Taurine, minerals (Zinc Oxide, Ferrous Sulfate, Manganese Sulfate, Copper Sulfate, Calcium Iodate), L-Carnitine, Beta-Carotene.