Barkworthies 3-4" Shin Bone Stuffed with Bully Stick Blend - Case of 2. Sold by the case of 2. Barkworthies Stuffed Shin Bones Are Durable And Long-lasting, And Are Now Made With A Variety Of New And Innovative Fillings! These Beef Shin Bones Are Made From Free-range, Pasture-raised Cattle, And Are Paired With Unique Fillings.