I have a big dog that can chew through almost anything. He finally met his match when we purchased the Kong Rubber Chew Toy from our local pet store. This odd shaped toy didn't look like much fun to me but my dog loves it. We have several of the Kong toys now and, no matter how old they get, unbelievably, they don't have a single chew mark in them. Rebel can sit and chew on one for an hour and nothing happens to the toy. Weirdness. Anyway, after awhile he got somewhat bored with the Kong toys. After doing some online research, I found a site called planetdog.com. This site has some amazing products....