Primal Recreational Bones are 100% human-grade, antibiotic and steroid free without added hormones. They use buffalo procured from ranches in the United States. Primal recreational bones are NOT to be completely consumed and should always be fed under the supervision of a human being. Their Raw Buffalo Marrow Bones offer an excellent method for dogs to exercise their jaws, massage their gums and clean their teeth while consuming amino and essential fatty acids that promote a superior quality of health. This natural source of protein and fat will provide raw entertainment for your pet.