You don't mention what kind of allergies your dog has. It is common with food allergies for dogs to chew themselves. My dog was relentless until there was no hair whenever he could reach with his teeth. It it is a food allergy, keep trying new foods until you find one he doesn't become allergic to. He will begin to chew again if he is allergic to something in the new food.
I finally ended up with a home cooked mix of brown rice and canned salmon that my dog ate until he died at 17 years. He never chewed again. I must have gone through 5 or 6 different mixes until I hit the one that worked. Don't give up and good luck.
What are you washing your floors with? Can it be an allergic reaction to that? Or to new carpeting? Do you put pesticides down on your lawn or walk the dog where pesticides are used?
Also, have you researched the pet food you're giving your dog? With all the bad stuff that is being put in pet food that might be an area to check out. Try typing in the name of your pet food in your search engine with "allergic reaction" next to it and see what you get. One "high quality" dog food I used caused seizures in my dog and other dogs that were fed it. Had I not checked it out on the web I never would have known and my dog may have been condemned to a lifetime of seizures. And of course the company that made it denied, denied, denied that it was bad food.
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