All our Bone Marrow Beef Chews are made from 100% natural dried Bone Marrow of Aussie Beef. We boil beef bones and extract the marrow into a gloopy mess. We then dry the marrow for up to 6 weeks to create a chew like no other. It's basically a bone without the bone. Safe for puppies and mature dogs of all ages. Bone Marrow is full of nutrition and is excellent for cleaning teeth. Our Bone Marrow Chews have many fantastic benefits: * They encourage and improve oral health (and in turn general health). Plaque accumulation and decay are prevented gingival indices improve and sweeter breath is noticed through the use of marrow bones. * They encourage and provide exercise.