I adopted a new puppy from the shelter about three months ago, and having him at the house has been challenging to deal with.

but its not necessarily terrible. We did not notice that this poor guy has PTSD of his own until we tried to do certain things, give him a bath outside with hose, groom excess hair off with a dog brush.
he would get really defensive and starting trying to bite and growl.

the worst so far is when we clipped his nails, since he was bond and determined to bite our next door neighbour that was helping us do it. As well as since I am technically going to school for veterinary technician training. I helped and restrained him so we could get the task done.

it stressed him so bad we decide to hold of on doing his front lol. But he just lost it when I restrained him he was really loud screaming and crying growling showing all his teeth and biting but I had in a good hold with his head away from me and not in a position that he could hurt himself.

but afterwards I was shaking like a leaf and feeling like I would just collapse on the ground.

I have no idea if its possible but it feels like cause I am around him and he can get triggered easily and quickly it feels as though that is rubbing off on me some how.

I know that being around other people that have been abused can effect you but can be around an abused dog do the same?