Get 15% off each AutoShipped order. Price will be reflected in cart at checkout. 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. This diet promotes a urinary environment unfavorable to the development of both struvite and calcium oxalate crystals. • Promotes the production of urine undersaturated (RSS < 1) for struvite dissolution and prevention. • Promotes the production of urine metastable (RSS < 5). Please note that the 3oz. cans are a Morsels-In-Gray consistency, whereas the larger cans are a pate consistency.