I have a Toller who loves to have a good chomp on this toy after a run. Although it is rated 5 out of 5 on the chompers scale, he did manage to nibble a small nick out of it. When I contacted the company, they were true to their word & very generously sent out a replacement! I highly recommend Orbee products, as that has been the only issue I've ever had & that's with all three of my dogs chewing on each other's toys!