Hairball supplement can help prevent and eliminate hairballs by supporting skin health and normal shedding. Veterinarian formulated without mineral oil or herbals, Hairball features omega 3 and 6 fatty acids to help minimize hairball formation by supporting skin hydration, resiliency and healthy shedding. Biotin is needed for healthy skin and normal shedding. Zinc is involved in keratin and collagen production, which are key factors for skin health. Cranberry powder supports urinary tract health. Hairball is not a laxative or lubricant, which can disrupt feline digestion. Even picky eaters love these delicious chicken liver-flavored chews made with naturally sourced ingredients. Directions for Use: General skin health: Give 2 chews daily To support the removal of hairballs: Give 4 chews, twice daily, for 2-4 days.