[Mya's_Mom]

I am sorry to hear you are having so much trouble with the chewing problem.
I had a 4lbs s**tzu that chewed through a bedroom door. The Foster Dog Agency sent over a dog Therapist/Trainer. I was told to crate him and keep a leash attached then not to let him see me. Then when he dug or chewed to tug the leash I was told to not give up even if it took hours. It was a disaster. I ended up taking my bloody dog to the vet. He had cuts his mouth and paws.
What ended up working? We put him in a very large cage with our dog Comic.
We also kept him distracted with toys and chew bones. The bitter spray only worked for a little while. Letting him chew ice worked in the past you could try that if you don't mind wet floors. You can give the dog ice while in it's cage.
Oh, also have you tried yelping like a dog? I know it sounds crazy but that helped as well when dogs we have had did not make the connection that toes and fingers are attached to a human!!! I have also used baby oral gel on the dogs gums and it instantly worked. I don't know if this is good advice. Perhaps someone else knows.