Bobby was a guarder, well documented on Col, and could have caused marital problems because OH didn't understand dog brains or the psychology of the training. One Robles we never. Cured was car guarding. Unless he was put in last, it was like the red eyed devil was in it. Also he had to get in all by himself, which could take ages.
That said, he was a fantastic dog.
I wondered if you've read ' Mine' by Jean Donaldson? I have a copy if you or anyone else would like it, free. It's really for trainers, but it goes through the many baby steps that a dog has to adapt to. It shows how to re-programme them. It's a huge learning curve having a dog like this, and in all my life, and eleven dogs, I had ever seen this before or after.
Please pm me if you want it, with your address.