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. Hills nutritionists & veterinarians developed Prescription Diet® c/d®® clinical nutrition specially formulated to support your dogs urinary health as well as reduce the risk of calcium oxalate and struvite stones. This irresistible food makes it easier for you to bond with your pet with gently cooked, bite-sized chunks of real chicken & natural ingredients with added vitamins and minerals. * Reduces the risk of struvite & calcium oxalate stones * Recommended for lifelong feeding of adult pets This food requires a veterinary prescription. Hill's is updating their Prescription Diet® packaging and a portion of the name. With Prescription Diet® c/d®, the current descriptor is "Urinary Tract Health"; in 2015 it will be "Urinary Care".