Purina Pro Plan Veterinary Diets UR Urinary Ox/St Canine Formulas are made with high-quality ingredients and formulated to help reduce the riskof urinary stone formation in dogs. The science behind our therapeutic diets represents a collaboration between Purina nutritionists, researchers and veterinarians. Promotes a urinary environment unfavorable to the development of both sterile struvite* and calcium oxalate crystals Helps dissolve sterile struvite stones* Helps reduce the risk of both sterile struvite* and calcium oxalate stone recurrence UR Ox/St canned diet contains significant moisture, contributing to total water intake Promotes increased urine volume to dilute the urine Appropriate protein content to help maintain ideal body condition and lean body mass Great taste