The Redbarn Filled Dog Bones are made with natural beef femur bones that are cleaned and cooked in our company-owned Kansas facility. They are then hand-filled through a proprietary process that allows our original Filled Bones to stay semi-moist and perfectly placed, adhering to bone walls instead of carpets. The Redbarn Filled Dog Bones are perfect for dogs of all life stages and are a great way to keep your pet active and busy.