Hi again! Okay, I need some advice. Quick explanation: I bought Scout, my 5 year old Am Staff from a BYB (oops!) in Alberta. Personally, don't think he is pure but they claimed he was. He was very well socialized as a youngster as I had a dog walking business for the first two years of his life. He showed signs of fear aggression from a very early age. He is a fabulous loving, loyal dog but has this issue. Anyway, he had many playmates out West and I also worked with a behaviorist/trainer for some time. Moved to Ontario where his social life has slowed immensely. He does have a girlfriend, though! Since the age of three, he has gotten really nasty with big males. He is great with smaller dogs and usually okay with females. He gets really freaked out if a big dog runs up to him. Thinking that they are going to beat him up so he gets really defensive. He is a big boy...90 pounds, so not fun to hold onto. He is very well trained, which helps. It makes our walks a little less fun, I must say. I have to always be on the lookout. I don't want to have to do the trainers again as it gets soooo expensive. Any suggestions out there?? Is he too old now and I just have to deal with it?? HELP!!