Tim, Don't think that blindness will necessarily preclude Gandalf from running free and enjoying life! Just a few extra commands will help tremendously. We taught our Sam the commands, up, down, over, under, and careful. That was about it! And when we called him, we clapped until he came.
We learned to watch as he ran after the other dogs, and we would call out if there was any obstruction. He would stop, and carefully negotiate. I tried teaching Left and Right, but he could never quite get the hang of those. He seemed to do all right without them! He learned to trust that we would keep him safe, and when he first came to us - he was timid and hesitant. After a few months, he would run after the other dogs and just have a grand time! Blindness is an obstacle, it is not the end of enjoyment! Pat Long (& Luther) Berwyn PA
