My GSD Buddy gets along great with his pit/lab sister Angel, however if i take him to the pet store or to the bark park he barks (along with his hair standing on end) at every dog he see's. I have trained him that the word "off" means he is to stop barking and sit. However I was wondering if anyone has any suggestions on how to socialize Buddy. He has not been interested in any dogs other than Angel since he was a pup and I am afraid that is just how he is going to be. Open to suggestions...seems there are alot of owners with training experience on this site. Thanks.