Founded by a veterinarian, Royal Canin has over 40 years’ experience in health nutrition. Our work with pet nutritionists, breeders, and veterinarians from around the world has provided us with knowledge about the specific nutritional requirements of cats. This knowledge has allowed us to formulate the optimal diet for your cat's special needs.Supports urinary healthModerate calorie content supports healthy weightRoyal Canin Urinary SO Index® promotes a urinary environment unfavorable to the development of both struvite and calcium oxalate crystals100% Complete and Balanced Nutrition100% Satisfaction GuaranteedFeline Urinary SO Moderate Calorie is a highly digestible, palatable, complete and balanced adult cat food formulated to aid in the nutritional management of calcium oxalate and struvite urolithiasis.