The use of the term "electric shock" is emotive. As I said, it's the equivalent of a mobile phone set to vibrate. It's a means of signalling to a dog at a distance that it needs to pay attention. It isn't harmful, nor painful, providing it's around the neck of a dog and correctly calibrated/operated. I think there's a degree of anthropomorphism going on.
Context is everything, and I've looked at some of the links provided, and the context often isn't there. To understand, people need to watch the whole story in terms of the before and after as shown on the TV programmes, which I guess many haven't watched.
If he was cruel, nasty, abusive, his TV show wouldn't even have got off the ground ? no TV company would have touched it with a barge pole. He has rescued dogs who would otherwise have been euthanized, and has successfully rehomed them. If people had watched his TV programmes they would have seen that.
There are many ways of getting a dog back on track, including CM's, and even his ways have merit no matter what some people think, because it's the result that counts. He has successfully rehabilitated dogs, which is the important thing.
I do hope that MNHQ cancels the chat with him, because all I can see is a witch hunt. Reasoned debate isn't available here.