Royal Canin Veterinary Diet Renal Support S is a highly palatable dry cat food that is specially formulated to care for the kidney health of adult cats under veterinary supervision. “S” stands for Savory, and this formula can help stimulate your cat’s appetite. The square-shaped dry kibble can be mixed with other Royal Canin Renal Support formulas, which have a variety of palatable aromas and dry or wet forms to help find the right combination to get your cat eating again. This energy-dense diet provides nutritional support in smaller portions, since cats with kidney challenges have decreased appetites. Plus, it contains a precise antioxidant complex, fatty acids from fish oil, low phosphorus, and targeted protein levels to help support kidney function.