Finally, Treating has a Higher Purpose 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, Digestive Care and Healthy Skin & Fur delivered in a delicious dual-textured treat cats love. Nutritious Ingredients Veterinarian-designed formulas feature natural fibers, coconut meal, premium proteins and fish oil for health benefits other cat treats can t offer. Hairball Control Cats need a balance of fibers to help minimize the formation of hairballs in.