Blue Buffalo Natural Veterinary Diet KS Kidney Support Dry Dog Food is a prescription formula for dogs with kidney disease or dogs needing extra kidney support. It's formulated with optimal levels of protein to help manage kidney workload, as well as restricted mineral levels to support kidney health. This Blue Buffalo dog food is a complete and balanced formula, for adult dogs. It starts with chicken as the first ingredient, and it contains vital nutrients like antioxidants and omega fatty acids to help manage inflammation. BLUE Natural Veterinary Diet is formulated without any chicken (or poultry) by-product meals. It's also free of corn, wheat, and soy, and contains no artificial flavors or preservatives.