Chuck: Sorry to hear about your problem. Obviously, any product that is made to be chew proof and makes that claim needs to be chew proof. That is why it is not something we never mention/claim. Chewing dogs are a problem for their owners. In most cases, this negative behavior can be changed with proper - in some cases, professional - training. There are rare exceptions where the chewing behavior cannot be changed. We can provide you with replacement parts for the ones that were chewed. The parts would be free we only ask that you cover the shipping. Contact us at www.newagepet.com and click on the customer service button and then request replacement parts.
PS: I saw the picture you provided. I would say that you have an extreme chewing issue.