Excess minerals in your dog's food can lead to urinary stone formation. Royal Canin Veterinary Dog - Urinary S/O Ageing 7+ is a high-quality dietetic dry food designed to help dissolve struvite stones and combat the formation of new stones. The special recipe of this Royal Canin Veterinary Dog - Urinary S/O Ageing 7+ offers urine-acidifying properties to help promote a pH value in your dog's urine that is inhospitable to the formation of new struvite stones. It also has a tailored mineral content, to help limit the components of stones in your dog's urine. Royal Canin Veterinary Dog - Urinary S/O Ageing 7+ has an exclusive nutritional profile that is tailored to the nutritional needs of senior dogs over the age of 7 years. Royal Canin Veterinary Dog - Urinary S/O Ageing 7+ at a glance: Complete dietetic food for dogs, designed to help dissolve struvite stones and combat reoccurrence Urine-acidifying properties: supports a urine pH that is inhospitable to the formation of new struvite s