Cats need a balance of fibers to help minimize the formation of hairballs in their digestive tract. FELINE GREENIES(R) SMARTBITES(R) Treats offer breakthrough functionality in an irresistible treat. SMARTBITES(R) Treats contain natural ingredients that provide real health benefits. In GREENIES(R) FIBERBLEND(TM) Formula, a combination of plant-based fibers helps minimize hairball formation and promote healthy digestion in a delicious dual-textured treat cats love. | Greenies Cat Smartbites Treats-Hairball Control-Chicken | Size 2.1 oz