Certainly not indestructible just the best yet. Our power chewing black lab eventually chewed away half the ball and half of one lobe of a "TUX" toy; but it took her a few weeks. A remarkable lifespan as ALL other toys we have tried have had a half-life measured in SECONDS! I took a marlinspike, punched a hole in the center of a "TUX" toy, and rove a foot and a half of 3/8" braided polypropylene line through the hole to make it easier to throw with greater distance; making it her favorite throw toy.