The Country Butcher 7" Beef Center Bone is their top seller. Most of these bones will have succulent marrow in the middle of the bone along with tasty meaty pieces left on the bone. Each of their center bones are dipped in natural liquid smoke and then slowly roasted. They are USA natural beef femur or tibia bones with no artificial ingredients. They are best for medium to large size dogs. All Country Butcher products are 100% grown and made in the USA.