@lsittll I remember our sheepdog was very stubborn. I don't think my parents had enough patience to be good trainers, and maybe some of it is the attention span and focus of the dog itself. Some breeds may not be good listeners. Our dog was like that too. He would walk up to me and take food off my plate or if he wanted to sit where I was sitting in the car, he just sat on me until I had to move. They may also be just too big to be service dogs when you consider that they could hurt a disabled person with their weight.