Royal Canin Urinary UC Low Purine for Dogs is a complete and balanced diet to assist the nutritional management of the following indications To help prevent urate urolithiasis To help prevent cystine urolithiasis To help prevent xanthine urolithiasis Low purine proteins combined with the production of alkaline urine help to reduce the risk of urate stones Naturally preserved to ensure freshness and quality Enhanced levels of linoleic acid zinc and biotin help to promote a healthy skin and shiny coat Moderate quantities of high quality proteins and controlled methionine and cystine levels help to reduce the formation of cystine stones Additional Benefits Enriched with long chain omega3 fatty acids EPA and DHA Enriched with antioxidants tOther products from PetCareRx