Purina Pro Plan Veterinary Diets NF Kidney Function Early Care Feline Formulas are made with a moderate amount of high-quality protein and restricted phosphorus. The science behind our therapeutic diets represents a collaboration between Purina nutritionists, researchers and veterinarians. Controlled sodium Added B-complex vitamins and potassium Energy-dense for needed calories Great taste Contains antioxidants Contains a prebiotic fiber that helps nourish a healthy GI tract (wet) No artificial colors