These bones are supposedly for aggressive chewers. I'm always curious about any dog toy that claims this since my pack includes some masters of destruction. So far, the bone has held up and they aren't any noticeable teeth marks. This is the good news. However, since this isn't one of the toys they typically go for unless all the others are either already being used or they can't find one of their favorites. This makes reviewing it difficult since it isn't getting a true workout since they aren't playing with it anywhere near as much as their other toys.