Lennox White Beef Bone Filled with Peanut Butter Natural Dog Chews are Natural beef femur bones that have been cleaned, sterilized, and bleached to a white finish. These bones are long lasting and feature a hollow center you can fill with peanut butter or pastes, and their hard texture helps scrape plaque from teeth. This bulk pack of sterilized bones offers a safe, satisfying chewing outlet with less mess or odor than raw bones. Available in Multiple Sizes