Royal Canin Urinary S/O Ageing 7+ Loaf is specially developed with an exclusive complex of nutrients that help to dissolve up to 80% of all struvite stones. Containing an exclusive blend of antioxidants and nutrients, Royal Canin Urinary S/O Ageing 7+ Loaf's blend of antioxidants and nutrients including very high quality protein which help to support your dog's kidneys, cognitive function, and vitality.