LOL, tried that once with my bosses PET weimeramer that had got hold of a muntjack, did he let go? did he feck, he aslo had a shock collar to stop him leaving the boundry, but 4 lambs later the boss decided to put up a bigger fence, never know though, it MAY work on some dogs, just not in my experience.
I run lure coursing days with every breed you can imagine, of the thousands of times we've done it we've always managed to get the dogs off the lure using one of those methods. Even the strongest, most extreme, headstrong dogs will let go with the proper use of a breaking stick.
i won