Hard rubber Kong Goodie Toys create a winning combination of food and play that will keep dogs busy for hours. Special "goodie grippers" hold treats, and dogs won't rest until they've gotten every morsel! Goodie Bones have classic bone shape with two goodie ports. Bones measures 6 3/4" and are available in the types listed below. Red is perfect for average chewers and super strong. Xtreme Black formula is ideal for aggressive chewers.