Lil Red Tuna Flavor Cat Dinner 20lb is specially formulated for adult cats that may be susceptible to Feline Urological Syndrome. This special mix of nutrients contains a low level of dietary magnesium to help reduce urinary pH and maintain overall urinary tract health. Lil Red Tuna Flavor Cat Dinner also provides your adult cat with the appropriate amount of all the vitamins and minerals it needs along with 100% of its daily nutritional requirements in a very appetizing tuna flavored morsel.