Barkworthies Large Stuffed Peanut Butter Shin Bone Dog Treat is a long-lasting chew that combines every dog’s favorite flavors. This all-natural treat is made from beef shin bone with a filling that blends the mouthwatering tastes of beef and peanut butter. As your dog enjoys his delicious chew, the hard texture helps brush off plaque and tartar. After the filling is gone, you can restuff the bone with anything from canned food to frozen yogurt.