Prescription Diet™ Canine u/d™ was developed to aid in the management of dogs with the problems associated with urolithiasis and/or for dogs with advanced kidney disease. It helps reduce the formation of oxalate, urate and cystine stones and contains a low level of high-quality protein to reduce the formation of breakdown products that cause discomfort in patients with kidney failure, with reduced salt to help control fluid retention in early heart disease. Also available in wet formation.