First exposure input please.

sounds like he said f u....im a newby so I will repeat what was told to me when I had a dog do same thing....slow and steady. rember the dog is getting slamed with a huge overload of sent, agression,sounds,people....he just needs a few more times,SLOWLY, at two yrs old hes already trained....he just needs to be retrained...from good stock,he will be ok I think..jmo. good luck

X2 sometime we just need to slow down and realize dogs are not machines and there not hard wired and programmed to perform the way we think they should. When he got excited that was a good thing. I would have introduced him to the pig when he got rowdy to. When he didn't fire right in on it on his own. I would have pulled him back out and ran him with the other dog. He has no confidence and the little he gained he lost when the hog got the drop on him.build him back up and start over. I would get down on it, its his first time. After a while if the dog dnt kick in move on. Maybe try a cross hobbled hog in the open and not in the pen. Work it like you would a pup.