I am more of a reader than a poster, but I wanted to share our good experience. We finally got the nerve to let Jack off leash (only in certain areas) on walks. He is doing really great! If gets more than 10 yards away, he comes running back. And to really tire him out, my wife & I will get about 200 yards apart and play "Go get momma/Go get daddy!" He's definitely a sprinter and not a long distance runner; he slows down considerably after the first couple... Just not sure what he'll do if he spots a cat!?!