Playology Rubber Dual Layer Bone Scented Dog Toy: Ham & Prime Rib. Built with a hard inner core, a chewy outer layer, and Encapsiscent Technology, the Dual Layer Bone mimics the texture of a real bone and is embedded with all-natural Holiday Ham and Prime Rib scents. For tough chewers. BPA Free. Small for dogs up to 15 pounds. 4 inches long.