Hill's nutritionists and veterinarians developed Hill's Prescription Diet k/d clinical nutrition especially formulated to support your dog's kidney health. In fact, k/d is clinically tested nutrition to improve & lengthen quality of life.Features & benefits  • Hill's Prescription Diet k/d Kidney Care with Chicken Dry Dog Food is specially formulated by Hill's nutritionists and veterinarians to support your dog's kidney and joint health  • Clinically proven nutrition to improve mobility and lengthen quality of life  • Special fibre matrix technology