Hills Prescription Diet u/d Canine is specially formulated for reduction of oxalate, urate and cystine stones and to support renal function in cases of chronic renal insufficiency in dogs.Dogs need the right balance of minerals to maintain good bladder health. Excess minerals can encourage the formation of crystals in the urine, which can lead to the creation of bladder stones. Please consult with your veterinarian if your dog is showing urinary signs such as frequent urination, blood in the urine, or others. Hill's nutritionists and veterinarians have developed Prescription Diet u/d clinical nutrition to be specially formulated to help support your dog's bladder health.Key Benefits Reduces the building blocks of urate and cystine stones Decreases risk of urate & cystine stone recurrence Supports a healthy immune system Controlled levels of high quality, highly digestible protein Promotes desirable urine pH levels & low in sodium Contains antioxidants including Vitami