Clinical precision for bladder health. Royal Canin Urinary S/O Canine in Gravy is a veterinary-exclusive wet food designed specifically for dogs with urinary tract sensitivities. This formula effectively dissolves pure struvite stones and helps prevent the formation of both struvite and calcium oxalate crystals. By increasing urine volume and diluting the mineral concentration in the bladder, it ensures a healthy urinary environment for your dog.