You need to find him better chew toys ones that he's more interested in....there are about a million suggestions here are some:
Kong filled with frozen peanut butter, applesauce, treats...
A dishtowel that has been soaked in water with maybe some bar-b-que sauce put in the middle, twisted up and frozen
Marrow bones (soup bones) you can get them at your butcher (be sure to scoop some of the marrow out as it can be to rich for them and give then nasty poops)
Personally i like bully sticks they keep Trudy busy for hours...unfortunately most people don't like them once they find out what they are....