Royal Canin Canine Urinary S/O 7.5kg is a veterinary diet formulated to support urinary tract health in dogs. This specialized dry food is designed to dissolve struvite stones and prevent calcium oxalate stones from forming. It works by increasing urine volume and acidifying the urine, creating an environment less conducive to stone formation. This diet should be used under the guidance of a veterinarian to manage and prevent urinary issues in dogs. The 7.5kg bag provides a substantial supply of this therapeutic food.