Pro Plan Veterinary Diets St/Ox Urinary Dry Cat Food Chicken With St/Ox Urinary Security - to reduce the risk of urinary struvite or oxalate crystal and stone formation. Promotes dissolution of urinary struvite stones. Moderate calorie to help maintain ideal body weight (obesity being a risk factor for urinary conditions). Contains nutrients such as omega-3 fatty acids and natural sources of glycosaminoglycans which help support the health of the urinary tract. Not suitable for pregnant queens, growing kittens and cats with chronic kidney disease. If in doubt, please consult your veterinary surgeon. Diet is Important Depending on their type, urinary stones can either be surgically removed or dissolved by feeding a formulated diet such as Purina Pro Plan Veterinary Diets Feline UR St/Ox Urinary. Whatever the cause of the urinary condition, a key aspect of management is to increase the production of a larger volume of dilute urine. Feline UR St/Ox Urinary is formulated to encourage cats to take in more water and has been shown to increase urine volume and dilution, when feeding the wet formula. Purina Pro Plan Veterinary Diets Feline UR St/Ox Urinary is highly palatable and its effectiveness in the management of urinary conditions has been verified by pioneering analytical methods called RSS and APR. The ST/OX claim highlights its efficacy in promoting a urine composition that will help dissolve struvite stones and help reduce the formation of calcium oxalate or struvite stones.