Our Filled Bone manufacturing process is a unique blend of state-of-the-art technology and handcrafted quality. First, the all-natural beef femur bones are bathed in industrial steel vats, allowing the bones to naturally clean themselves. Then, they’re oven-roasted for maximum safety. Finally, we hand-fill every bone through a proprietary process, allowing our original Filled Bones to stay semi-moist and perfectly placed, adhering to bone walls instead of carpets.