Boy can I sympathize with you. Our Casey, who we call Jaws, is a chewer. Window blinds, cords, woodwork, shoes, glasses, you name it. He is finally starting to slow up. In addition to teaching NO, we have redirected him to other chewing things and he has finally gotten the notion that he should only chew his things.
We used an old sock with a knot tied in it, frozen, for really bad teething. In addition to bully sticks, bully tails, bimple bones, he LOVES chewing on toys from Helping Udders: http://www.helpingudders.com/
The x-pen is a great idea! And I love your new Lucky avatar. He is so handsome.
Molly and Murphy (tri), Katie (ruby), Casey (B/T),Spike the wonder pup (tri), Suzie (tri) and Penny (blen)