This trainer got results with this method.
I don't particularly think it is fair to take a dog into a stimulating situation, slap a prong on it and correct it until it does nothing. I choose to teach the dog how the leash works, what behaviors I am looking for, and how to turn the leash off. I do all this before I add any distractions.
With that being said, I saw no harsh corrections at all. I wouldn't fault a trainer for working like this with this type of dog. If you try the same thing with a harder dog, you could get bit. A prong correction will sometimes amplify the intensity in the dog.
When a dog saves the life of a man, it becomes clear that partnership knows no bounds.
Fama - T.E.D.D. OEF XI-XII (GSD)(RET)
Marshall - T.E.D.D. OEF XII-XIII (Lab)(SF EDD)
Lucian - Med Alert / Mobility SD (Cane Corso)
Pud - the old man (Pit x Lab)