A healthy bladder starts with the right balance of vital nutrients. Excess minerals can encourage the formation of crystals in the urine, which may lead to the creation of bladder stones. 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 cat's urinary health. In fact, c/d Multicare is clinically tested nutrition to lower the recurrence of most common urinary signs by 89%.