Cats need a balance of fibers to help minimize the formation of hairballs in their digestive tract. In our FIBERBLEND Formula, is a combination of plant-based fibers helps minimize hairball formation and promote healthy digestion. Feline Greenies Smartbites Treats offer breakthrough functionality in an irresistible treat. These smart treats are not indulgent empty calories. Smartbites Treats contain natural ingredients that provide real health benefits. Hairball Control delivered in a delicious dual-textured treat cats love. Finally, treating has a higher purpose.