Purina Veterinary Diets have been scientifically formulated and are backed by extensive testing at the Purina Pet Care Center. These high quality diets are authorized for prescription and sale only by veterinarians. Diabetes management: DM may be beneficial in the dietary management of certain conditions in cats including the following: Diabetes Mellitus, Chronic Diarrhea. For additional information about this diet, consult your veterinarian. Calorie Content: Metabolize Energy (ME): 4118 kcal/kg 592 kcal/cup. This bag contains approximately 19 cups of food. Animal feeding tests using Association of American Feed Control Officials (AAFCO) procedures substantiate that Purina Veterinary Diets DM Diabetes Management brand provides complete and balanced nutrition for maintenance of the adult cat.