Proven to help reduce urate, oxalate and cystine urolith formation in dogs. How it helps: 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 Key Benefits Helps reduce the formation of oxalate, urate and cystine stones. 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. Please consult your vet for further information and guidance on what is best for your dog. COMPOSITION: Cereals, derivatives of vegetable origin, oils and fats, eggs and egg derivatives, minerals, meat and animal derivatives, seeds.Urine alkalising substances: potassium citrate, calcium carbonate.Protein source: Dried whole egg.