Barkworthies 6" bully sticks are virtually odor-free and 100% digestible. they're a great way to give your dog an all-natural chew he's sure to love! 6" bully sticks are an excellent size for small to medium dogs and stand up to aggressive chewers for a long time. These chews are made from free-range, grass-fed cattle. Their unique shape and texture promote good dental health while helping prevent bad doggy breath. Barkworthies are additive-free, chemical-free and preservative-free.