KONG Extreme Ball with Hole - Fetch Toy - Durable Dog Toy for Training, Interactive Playtime & More - Natural Extreme Rubber Ball - Black - for Medium/Large Dogs

Solid kong balls have been the only thing to survive my dogs, and they last forever. I highly recommend. There are other brands as well but I haven't tried those https://a.co/d/0181pNCE Also, deer antlers are pretty tough and take them a while to whittle it down.