Oh Gonzo...I know a lot of BCs that are not social friendly! (though Blaze pretty much is with other dogs) All I can say is maybe start with smaller dogs, then move up and have him play with bigger dogs that aren't rough. Other than that, it could just be the way he is...as Mickey the next door BC is pretty anti-social and he always has been. (he's 9 now) So I really don't know what else to say...