Hartz Oinkies Hearty Twists are highly digestible and irresistible dog treats made with layers of naturally good, real ingredients you can see.Does not contain beefhide or beef rawhide, the pork core is a natural source of collagen, wrapped with real chicken breast and sweet potato, which is a natural source of fiber. These dog treats are smoked and oven-baked to lock in that delicious flavor your dog will go crazy for! Oinkies Hearty Twists are considered a medium chew.