Hill's Prescription Diet c/d Urinary Stress Feline is a complete dietetic pet food for the reduction of struvite stone recurrence (cause of feline lower urinary tract disease, FLUTD) in adult cats that also helps to manage stress. FLUTD (Feline Lower Urinary Tract Disease) is a complex condition which is often related to crystal creation in thelower urinary tract, a painful condition for many cats. The two most common types of crystals that form in the urinary tract of cats are struvite and calcium phosphate. Struvite crystals and stones usually develop from a combination of urine saturated in magnesium, ammonium and phosphorus and alkaline urine pH. A controlled amount of phosphorus, magnesium and calcium helps to reduce the formation of bladder stones. ** - Great tasting tender chunkcs and gravy pouches that your cat will love Hill's Prescription Diet Feline c/d Stress Urinary Care with Chicken promotes a healthy urinary tract. It is clinically proven to dissolve struvite stones in as little as 7 days and reduce the recurrence of FIC signs by 89%.