Bravo! offers both a buffalo and a beef marrow and knuckle bones. Bravo! Bones are uncooked, fresh cut, individually wrapped and flash frozen to preserve their natural goodness. Bravo! Bones are made from human grade beef bones and premium grade, ranch raised, grass-fed, buffalo from Montana. The same bones sold fresh in the grocery store for human consumption. Bravo ! Bones come in a reclosable plastic bag for EZ freezer storage and reuse.