Hill's™ Prescription Diet™ c/d™ Feline Urinary Stress is clinically proven to reduce the recurrence of Feline Lower Urinary Tract Disease FLUTD and contains ingredients to help manage stress in cats, a known risk factor for FIC (Feline Idiopathic Cystitis). Clinically proven to dissolve struvite stones and contains L-tryptophan and milk protein hydrolysate to help control stress in cats. Also available in Chicken and Salmon pouches.