Hey guys, looking for the best dog trainer to deal with an unruly 4 and a half month old pitbull pup who is displaying over excitement and barking with other dogs? He is friendly once he gets up to greet them but I'm not too keen on the judging stares and people scrambling to scoop up their dogs and kids in the assumption he's aggressive. Not pleasant for them or myself. I need a very firm trainer with lots of experience with large powerful working breeds. Thanks in advance!