Recommended For Adult cats one year and older. Also for weight management and hairball control. Product Information Formulated for Weight Management and Hairball Relief Iams Indoor Weight & Hairball Care helps your cat gradually lose weight and maintain a healthy weight, plus it helps reduce the likelihood of hairball formation. We've also added vitamin-rich fish oils for a lustrous coat and healthy skin that reflect your cat's vibrant overall health. Our patent-pending fiber system gently moves hair through the digestive tract and helps maintain colon health. All in one great-tasting formula.. Now with Iams Daily Dental Care. As your cat chews, Iams Daily Dental Care helps slow tartar build-up by up to 40%.