Just quickly, we are all saying the same thing, I think. I would never shake a redirected, accidental bite, but I would an aggression bite.
If I am in the way of a bite, I work immediately on something else and pretend like it didn't happen, wouldn't even look at the bite sight even if it were bleeding.
But I have to admit that when the dog that tore into me and might I add after he had tore into Cleveland, that dog had a fight on his hands. I came out with 17 stitches and the dog and I later....... had a decent relationship, but we both understood, that I was not taking any crap from him and he was not going to bother Cleve ever again.
It was the hardest thing I ever did in my life.
I absolutely commiserate. I've never had to do anything like that. Duncan has nipped me when excited trying to herd me about, but that's about the extent. But if it were an aggression attack, you have to stop that right then and there. What if there were a child or something too near when the dog spazzed? So while others may think your reaction would be over-the-top, I commend you for putting it out there.
Lahree, I think a visit to a vet is in order. Perhaps they have hormone tests of some sort that can be done? You could discuss medicines or alternative routes to be taken. That way at least you have a concrete Plan B. No one can deny that you have given this dog everything and tried every angle. Please don't beat yourself up for this.

