USA Marrow Bone This dog bone is 100% natural from the finest American free range cattle . The perfect size for medium to large dogs, think of it as a gourmet meal for your furry friend! Excellent source of calcium and filled with delicious, nutritious marrow This bone will keep your dog busy for hours and hours while providing a healthy treat and help clean their teeth! Like all our other EcoKind Pet Treats, this stuffed marrow bone is sourced and manufactured in the USA!