Hill's Prescription Diet c/d Multicare Urinary Care with Chicken Dry Cat Food, Veterinary Diet, 4 lb. BagHill's Prescription Diet c d Multicare Urinary Care with Chicken Dry Cat Food is specially formulated by Hills nutritionists and veterinarians to support a cats urinary health Clinically tested to lower the recurrence rate of most common urinary signs by 89% Dissolves struvite stones in as little as 7 days (Average 27 days) and promotes desirable urine pH levels Formulated to promote a urinary environment that reduces the risk of developing struvite