What dog can resist a treat-filled toy? Dogs stay busy removing tantalizing KONG treats from the patented Goodie Grippers of the KONG Extreme Goodie Bone. Recommended for high-drive adult dogs that are aggressive chewers. Medium bone made with Extreme KONG Hard/Most Durable Rubber. Size: 2.50 in x 7 in W x 1.75 in H Material: Rubber Caution: Supervised use only. Remove all packaging. Discontinue use if damaged. Power Chewers may need to size up one or two sizes.