OK, that is a cute video showing shaping of a behavior. I don't think anyone on these forums will argue that when teaching a behavior your need to use harsh corrections... that would be counter-intuative. Now take that cure alligator and put it in a pen of everything it likes to mess with... some chickens, some small dogs, some small children.... and now agitate it and amp it up since it is in a strange pen. Then put all your trust in the fact that you used some treats to teach it how to ring a bell, maybe even do a few tricks and that it will not attack... or even investigate all those delicious things it wants to mess up.
This video and your comment on it, is comparing apples to oranges. Prongs, chock collars, haltis, and head harnesses are all perform corrections, and the difference is largely in what kind of correction is performed and how "scary" the device looks. Just because it looks cute or benign does not mean that it is not performing a correction. There are very few positive only trainers, and even those who claim that still use devices that use corrections like easy walk harnesses. This is because shaping a behavior in a controlled environment is very different than controlling a dog who is excited, aggitated, or distracted in a high distraction environment. There are many dogs who put a higher value on what they want to do over whatever delicious treat is in your hand, or ball, or that pet that you are going to reward them with. This is not all dogs. Some dogs are more mild mannered and need little to no corrections and only positive reinforcement, but there are other dogs who are the opposite.
Please do not try to assert that a one size fits all training is every appropriate to every dog. It leads to incredibly out of control dogs that are a liability to both their owners and the public.
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