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 especially formulated to support your dog's urinary health and reduce the risk of struvite and calcium oxalate stones.Why We Love It Controlled levels of magnesium, phosphorus and calciumEnriched with antioxidants, potassium citrate & Omega-3 fatty acidsControlled fat levels with low sodium