Primal Frozen Marrow Bones LargeA durable and engaging raw treat! Beef Marrow Raw Recreational Bones come in individual packs (Small, Medium, or Large) or a 6 pack option. Small Beef Marrow Bones are ideal for cats and small dogs, while larger bones can be enjoyed by dogs of all sizes. Natural source of protein and fat Promotes dental health Beef raised in the United States without antibiotics or added hormones Ingredients Beef Marrow Bone.