Hill's Science Diet Adult Hairball Control cat food provides precisely balanced nutrition to help avoid the formation of hairballs in just 30 days. Science Diet Hairball Control has a unique fibre technology to reduce hairballs formation by moving hair through your cat's system. Its high quality ingredients make it ideal for every day feeding. Helpful Tips - Adjust feeding amounts as necessary to maintain optimal weight. - New to this food Mix increasing amounts of your pet's new food with decreasing amounts of the old food over a 7-day period. - Keep fresh water available at all times!