Royal Canin Canine Urinary Low Purine is a diet which helps to dissolve mineral stones which can be found in the bladder and kidneys of cats and dogs. Some species of dogs are more prone to bladder and kidney stones than others and Canine Urinary Low Purine can help to reduce their ocurrence. The diet is specially formulated to increase urine volume and increase the acidity of the urine produced. This helps to dissolve stones that are already present and to reduce reoccurrence of stones once the condition is under control. Royal Canin Urinary is a veterinary diet tailored for use in several clinical conditions relating to Lower Urinary Tract Disease and should be used under the guidance of your veterinary surgeon.