Made with 100% all natural hardwood smoke. We never bake or dehydrate our bones because it weakens the bone. Also, we NEVER use liquid smoke, additives, preservatives, mold inhibitors or any other harmful chemicals that can cause health problems for your pet. Instead we only use 100% all natural, farm raised, grass fed, USDA inspected beef. To smoke our bones we use an old Southern, 100% all natural smoking technique that serves as a natural preserver for the marrow, the meat and the bone itself.