Hills's Science Diet is the #1 choice of U.S. veterinarians to feed their own pets. Hill's Science Diet Mature Adult Hairball Control cat food provides precisely balanced nutrition to help avoid the formation of hairballs. It is made with a natural fiber technology to help reduce hairballs comfortably and has controlled levels of sodium and phosphorus for long-term vital organ health. It also has Omega-3 fatty acids that Nourish your cat's skin and coat. Recommended for adult cats age 7 or older that are prone to hairballs but Not recommended for kittens, pregnant or nursing cats.