I don't know if I've been clear in my posts - but this specific behaviour that I'm referring to is completely unrelated to Ollie's normal puppy behaviours..his play biting, his pushing boundaries, his occasional body stiffness, his growling when he's uncomfortable... 99.999% of the time he's doing exactly what I would expect of an alpha- type, exuberant and bolshy puppy and I'm not concerned about that especially. He is trained beautifully, his recall is perfect, he is very good around all other dogs, children and people in general.
What my concern was really about was the 0.001% of the time when all the usual rules suddenly don't apply, and there was a disconnected frenzy that was not readily traceable and happened so rapidly that no avoidance was possible - the grr-bark-bite with FULL FORCE until puncture wounds. The bite comes less than a second after the initial growl - the collar responded more quickly to the bark than we could to any of it. This can not be trained out of because it happened at unpredictable times, in scenarios that at other times he has not responded to, and when his wiggly body language suggests he is alright. That is what made it so scary, and that is why we have had others who have lived with dogs all their lives express concern. The collar responded and stopped something that we could not stop or readily anticipate (I know people are reading this thinking 'you just didn't notice the signs' - I'm sorry - you are wrong. You really needed to see this. That's why I was worried about rage. It has not happened in 9 days and I think the collar has played a role in that.