Do you have one of those soft collars? That way she couldn't chew on herself so much. I wish I could help you more. I know you've been battling this for the longest time. I haven't posted in a long time, because I really had no advice.
You can get some four-legged joggers for her. When she goes out, she won't be quite as cold. That is what I put on mine in the coldest of weather and then a coat over that!
This link belongs to one of our YT members:
dog clothes joggers