If your not family,my older lab will hate you, black, white,uniform, or bikini...he's a racist against humans in general...and he used to bite everyone who came over in the ass...oh,and he also hates all other dogs except our other lab...when he was a puppy a big nasty stray dog jumped into MY yard and attacked him, it almost got shot but I couldn't tell them apart...my pup held his own, then 9 months later we had an intruder and that dog tore into him pretty good...left a football shapped bruise on the guys kidney area...FYI,that guy almost got shot too....after that he's been my best bud, he's 12 now and a little mellower, but he's teaching the new lab his watchdog killer ways
...he loves kids though, always has been great to all the kids...