Hill's Science Diet Urinary Hairball Control Adult wet cat food is specially formulated to support the entire urinary system while helping reduce hairball formation. Optimal magnesium levels promote urinary health, while natural fiber helps comfortably move hair through the digestive tract. Made with highly digestible, high-quality protein to maintain lean muscle, it also contains beneficial fatty acids, fiber, and antioxidants to support healthy digestion, skin and coat, and a strong immune system.