Bladder stones are collections of mineral crystals that combine together in the urinary tract. They can cause discomfort and lead to more serious problems that require the care of a veterinarian. Hill's nutritionists & veterinarians developed Prescription Diet c/d Multicare clinical nutrition specially formulated to support your dog's urinary health and reduce the risk of struvite and calcium oxalate stones. How it helps: Helps dissolve struvite stones Lifelong feeding is important to manage urinary health long-term S+OXSHIELD: Formulated to promote a urinary environment that reduces the risk of developing struvite & calcium oxalate crystals. Recommended for lifelong feeding of adult dogs. How it works: Controlled levels of magnesium, phosphorus and calcium Enriched with antioxidants, potassium citrate & omega-3 fatty acids Low sodium