Barkworthies Odor Free Bully Sticks are 100% digestible, making them a great alternative to traditional rawhide. Dogs love the natural flavor. You'll love the fact that these chews are virtually odor free! Their unique shape and texture promote good dental health while helping prevent bad doggy breath. As with all of Barkworthies products, Barkworthies bully sticks are additive-free, chemical-free, and preservative-free.