Ya know, I correct the aggression. I do not pound on the dog. I usually just say something like, "Eh!" and then, "Enough of that, Leave her be" in a matter of fact tone of voice.
I think that to eliminate the growl so that a dog that is warning of an impending bite, will no longer growl or posture or snap first, one has to really give a very strong correction with respect to the dog in question. If the dog is extremely soft, than it may not have to be a terrible correction. But for most dogs, I think that one would really have to go overboard. Like taking a dog into a situation that terrifies them and then the moment they show any sign of fear or aggressiveness, clobber them. And probably repeat that several times.
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