Get a copy of The Dog Whisperer series:
https://www.cesarsway.com/
Great show. There's a lot of human personalities contained in them which affect the dogs way of acting. How we think and how dogs think are totally different. The anxiety disorders can be overcome but only the correct way of reprogramming will work. Else it's just banging the head against the wall. Doesn't work. Doesn't work. Doesn't work. Doesn't work. Doesn't work. Doesn't work. Doesn't work. Doesn't work.