Cody use to chew his fur off when he was younger because we didn't know what he was allergic to. He also didn't have hair around his groin area, looked bad too. After we had him tested to everything here in WA that he could be allergic to, the list was HUGE. We found out he was allergic to fish, beef, alfalfa, kelp, corn, dairy products, many kinds of grass, trees, kapok, cotton, mouse poo, cochroaches, lol, the list goes on. After trying to elminate everything he was allergic to that we could control, he completely stopped chewing and all of his hair grew back, even the hair around his groin grew back, I don't think I've ever been happier then seeing his hair grow back down there.
Some of the things I can't stop, is things like Cotton as we wear a lot of it, and right outside our house, is a tree he's allergic to, go figure. lol. But what I can control, ie food, things in the house, I try to keep everything he's allergic to to a minimal and it has worked. The only thing he does now that shows he has allergies, is that he "nibbles" on anything that has or is cotton and kapok. It's like he's in a trance, very funny to watch.
He hasn't chewed since we took everything away he's allergic to, except he still chews a little bit around his arm and chest area cause those places touch trees and the grass but besides that, he's chew free.
Picture of his chewing, see the missing hair near his hip area?
Him today, no hair gone, going on 3+ years
Him "nibbling" lol