Royal Canin Veterinary Diet Urinary SO Moderate Calorie Morsels in Gravy is a complete and balanced diet for adult dogs predisposed to weight gain. It is formulated to aid in the nutritional management of calcium oxalate and struvite urolithiasis. The formula is designed to support your dog's urinary health by supporting struvite dissolution, and also supports a healthy weight with fewer calories.Royal Canin