It was suggested that this topic would be better served in it's own thread.
If faced with a dog like the Korean Jindo that was attempting to bite CM, he held the leash high and, at times, it appeared that he was keeping the dog's feet off the ground. That may or may not be the case. If it was, it may have been to prevent a nasty bite. This was a dog that wasn't intimidated by leash corrections. He might have been fearful of the leash or the imprisonment that the leash might represent but he was aiming to get a piece of CM, if at least to get away.
CM is not tall. In fact he is slightly under average height. Same scenario but in another episode with an Alaskan Malamute who was nearly the same dimensions as a wolf and was able, in fact, to rear up or keep both feet on the ground for better traction and he landed more than one bite on CM who then had a ripped shirt and was bleeding in a few places. CM's advantage is that he doesn't flinch or panic when he gets bit. Something most people can't do. In fact, since the show has the disclaimer of not trying it at home, it may not be suitable for discussion amongst a bunch of us amateurs. And when someone here has sought a behaviorist or trainer, it is usually with the idea that they can be given techniques or protocols that can and should be used at home to reinforce the changes or calming or whatever.
So, given a dog that's not interested in a treat and doesn't want the collar, what would you do if faced with this scenario?
Well, ACO's use catch poles to isolate themselves out of bite range. For dogs to big to handle that way, they use a tranquilizer gun. For extreme cases where the dog is attacking them, a cop will just plain shoot the dog. If the dog survives capture, they go to the shelter, get evaluated, then euthanized.
The Jindo in this scenario didn't have trust in humans. So, my method would be to build trust. Dogs build trust in each other with signals that say, "I'm not going to hurt you. We're cool." And those moves are appeasement moves. So the first thing I do is present my side, not a frontal presentation with eyes staring and a stern look. The leash is the last thing we're going to deal with, not the first. And an owner that is not willing to wait the required time may be in over their head. But I am going to be that dog's best friend, after a while. And then introduce the leash as something in the room that can be fun to encounter. Over and over until it ain't no big thing or is even a fun thing. I am reminded of how Glenda got her dog acclimated to the prong and then he wore it like jewelry. Or how Sheba turns into the picture of calmness when she gets to wear her muzzle. This won't happen in an hour. It might take a week or two.
I could use a physical hold or leash restraint but that is only if someone's life is at stake, not as a matter of leash training, IMO. The problem with restraining any creature against their will is that they don't have the chance to offer the behavior and learn it themselves. All they know is the moment, if we are going to use the phrase, dogs live in the moment. Well, at the moment, the Jindo is extremely frightened and restrained and struggled against by another person he doesn't even know. And if dogs live in the moment and receive what they perceive as a punishment, then they are being punished for the thing they were doing at the moment, even if that thing was giving warning signals or trying to remain calm. So, if remaining calm or giving a warning signal results in them getting into a restraint that frightens them, they might quit giving warnings or trying to remain calm, as punishment can stop a behavior or option. Of course, one could just hold on for dear life and wait for the dog to wear himself out. Exhaustion, IMO, is not training or behavior modification.
I did see the follow-up on the Jindo and he seemed okay.