I think him regressing on his leash/heel/not pulling training is really my fault. Since my arm has been broke, his fault, I haven't been walking or running with him much, afraid to hurt my arm even more while its trying to heal. Though he has improved greatly on his stay and come and "go get your ball" during this time. =)
I went to my first obedience class last night without the dog, told the lady I want to work on him greeting other dogs, I didnt tell her the real problem is his posture meeting other dogs though. She has alot of experience training dogs, I took her class 15 yrs ago!!! So she should have some good advice. I think my game plan right now is to get him to sit while greeting other dogs, I'm not sure how possible this will be though. Its gonna take a lot of work.....and two working arms.
As far as other dogs attacking him at the dog park I'm not sure what I can do. Hopefully if I can get him to meet other dogs calmly it will help. Unfortunately, he really doesn't have any doggy friends outside the dog park to practice on. This is actually my main reason for the obedience class so he can have exposure to other dogs in a more controlled environment. I'm crossing my fingers it will work.
I had someone mention that it may be his physical appearance in itself. His tail is docked and that may make it harder for dogs to read his body language. Also something about his ears but I didn't really understand that one, his ears look like normal pit bull ears undocked. I still think maybe he just smells bad