A man's Dad was causing so many problems, he took his Dad's keys and drove the car home with him one evening....without the wisdom of Solomon. His Dad had a new Cadillac parked in front of his house the next afternoon. Walked past a home to and from school as a child. They had a Doberman. There was no fence, but the dog actually knew where people should and should not be. We, also, knew where his boundary was. He would bark until we passed the property. Still remember that dog over 50 years later. Found this quote that is interesting: That must concern something specific, as most people have some form of boundary. I sometimes think it might be human nature to see how far they can go.