I got the T-rex for my dog who is a powerful chewer as they put it.  He didn't even have it for 5 minutes before he broke a chunk off of the body and got it lodged in his molars.  He freaked out for a few minutes before I was able to get a hold of him and figure out what the issue was.  I ended up having to sit on him while reaching back into his mouth to pry the wedge piece out of his teeth.  Never again will I buy Nylabone.  I'm sticking with KONG