It's all matter of opinion on what is humane I suppose, and the difference in personality between dogs. I would never squirt my dog in the face with vinegar, but a prong is necessary for him. For our day to day walks, a prong does nothing more than remind him to be polite. I don't normally need to correct with a prong at all. However, when something triggers the aggression then I NEED the prong in order to snap him out of it. I have literally ripped his neck as hard as I could, and it did nothing to stop the behavior, or deter his attention from the person he was focused on. In contrast, it takes only a light pull on the prong to stop *any* behavior. Part of it might be that he is so small that only a light tug moves him, and doesn't give proper correction.
Part of the reason that I prong works for me I believe is that my dog is fear aggressive, not dominant aggressive. So a tug with the prong makes him fall back to defer to me, rather than triggering more aggression, or dominance issues. From a pack perspective, that would be the correct response. As pack leader, it is my job to correct him if he shows aggression that I did not approve. His response shoud be to step down and submit. If you dog is showing aggression at the prong collar, then it is probably likely that you have dominance issues that need to be addressed. Although fear is supposed to be harder to train a dog out of, I'm thankful I don't have to contend with dominance as well (because I know he is not going to hurt my kids, which i wouldn't be able to guarantee if he was determined he had authority over them).
At any rate, I consider the prong far more humane than alternately doing nothing. It literally is a life and death situation. If his agression is not controlled, then he *will* bite someone seriously, which will result in his death. I will do anything at all to insure that the behavior stops. The incident with him going after the neighbors dog was a real eye opener. I don't trust him off leash ever, and did not realize that we were actually having such good sucess with the training. I'm very proud of him.
