Great Dog Bison Horn Middle (Sourced & Made in USA) Great Dog Bison Horn Middles come from the inside of the Bison Horn which acts as a substructure for the keratin rich Horn Cap Bison Horn Middles are ideal for outside feeding, softer than a femur bone and 100% consumable as they break into small, irregular shapes creating long-lasting gnawing enjoyment They are extremely vascular, high in calcium, phosphorus and magnesium and dogs absolutely love them Great Dog Bison Horn Middles are approximately 7-9 inches long, weigh approximately 1 pound and each bag contains 1 Bison Horn Middle Sourced from free-range American grazing bison and always additive free