Purina Pro Plan Veterinary Diets Canine UR Urinary is formulated to promote urine in the p H range to help dissolve urinary stones. It can also reduce the risk of stones reforming. When bladder stones form they irritate the bladder which causes pain & bleeding. If your dog suffers from urinary stones they will need to be removed, either surgically or by dissolving them with a specific diet. Pro Plan Canine UR Urinary helps your dog to produce an acidic urine which can dissolve the stone. The tasty dry dog food has a low magnesium content & contains only restricted levels of finest top quality protein. This helps to stop bacterial infections from developing. Omega 3 fatty acids & antioxidants encourage a healthy urinary tract. Purina Pro Plan Veterinary Diets Canine UR Urinary: With urine acidifiers & a low magnesium content Promotes acidic urine to help reduce badder stone formation & promote dissolution Moderate protein to help minimise availability of food for bacteria Very digestible, encourages your dog to eat if it is suffering from loss of appetite Dog food which causes to urine to become more acidic may help to reduce the formation of struvite crystals & stones. Since not all lower urinary tract illness are associated struvite crystals it is important that your pet is diagnosed as suffering from struvite crystals before you feed your dog this dietary pet food. Please consult your vet about possible treatments for your pet or if you need further information