Great Dog Bison Marrow Bones (3 Count Bag) are sourced from free range grazing Bison raised on small family farms in the Midwest, approximately 2.5 - 4 inches in length and have lots of marrow, meat and fat tailings left on to provide extreme flavor and gnawing enjoyment while maximizing teeth cleaning action. Bison Marrow Bones are a great alternative for dogs with beef allergies and other food sensitivities. Great Dog Bison Marrow Bones are slow roasted in their own juices to a golden brown color. Bison Marrow Bones are cooked in a State 2 certified human grade facility without smokes, soaks, washes, nitrates, colorants, BHA or BHT.