Excellent substitute for antlers/bones. Due to the cost of buying bones and antlers we have been searching for another hard chewing toy that will last longer than a week. The Nylabone holds the current records at several months before our corgi reduces it to a small hunk of plastic. She does not loose interest over time and continues to enjoy using it to satisfy her destructive chewing urge. Great product. Will be buying again shortly as her last one is getting a little small.