Walking with Mr. Wilson

He wants so much to pull, but we've trained, and trained some more, and he takes the leash as far as he can before he feels pressure around his neck, and he stops, and waits for me to catch up, then does it all over again. But all bets are off when a dastardly squirrel crosses our path, then the training goes out the window, and he barges forward, and nearly breaks his neck when his run is abruptly stopped. "Dad, why don't you let me catch one, just once?" his eyes plead as he looks over his shoulder at me. "Because once is never enough, old pal." He turns and looks forward, and takes the leash almost to the edge, and slows down and lets me catch up.