ABOUT: The BarknBig Bison Bully Stick 10-12" is made from USDA inspected bison pizzle. This premium-quality bully stick will keep your dog entertained for hours on end. This odorless chew is safe for indoor enjoyment. Always monitor your dog with any bone or chew. Our Bison is premium-quality because we source only free-range, grass-fed, and USA bison.