Center bones are popular with any size dog and are one of the Jones’s top ten favorites. Most of our centers will have succulent marrow in the center of the bone along with tasty meaty pieces left on the bone. Each of our top ten centers are dipped in liquid smoke and then slowly roasted. These 4” USA all-natural beef femur bones with no artificial ingredients are best for small to medium size dogs. All Jones products are 100% grown and made in the USA.