Royal Canin Urinary SO for cats is a complete and balanced diet used for cats with or at risk of developing feline lower urinary tract disease to help dissolve pure struvite uroliths and help prevent struvite urolithiasis calcium oxalate urolithiasis and calcium phosphate brushite urolithiasis Promotes the production of urine undersaturated RSS 1 for struvite dissolution and prevention Promotes the production of urine metastable RSS 5 for calcium oxalate prevention Moderate acid load to encourage the production of urine with a pH between 6063 Increased sodium chloride content to increase thirst and promote formation of a dilute urine Restricted magnesium and phosphorus levels Controlled levels of calcium and oxalate Increased leveOther products from PetCareRx