have a 1 year old pit bull and he is a great companion. When he was about 9 months he slipped out of his leash downtown and ended up getting hit by a truck. Luckily he survived but when it happened we corralled him back to us and then a swarm of people gathered around to help. We took him to the vet and he was cleared medically. Now, ever since then (he has been neutered by the way) he barks at absolutely everything walking by particularly and almost always at night. If I take him on a walk and he sees people he FLIPS out and sounds like he wants to rip them apart. Why is he doing this? I want to know if he will bite people but I don't want to chance it- any training advice?