Fortunately for your veteran friend, dogs owned by whites naturally tend to hate hoodrats. It's essential to train them to avoid picking up food from the ground or taking it from strangers, since the first thing you do with a problem dog owned by a potential victim is to poison it (Arabs here do that before stealing from Jewish farmers.) Also it's good to have 2-3 dogs so that they can pack up; one dog is easy to subdue with a long pole or a Tazer, although I doubt ghetto blacks have the motivation or discipline-but you can never be too sure. You have to make sure they are not restricted in their movement; unleashed is the way to go, although cops are a problem if you're walking with them off the leash.
I myself have a small border collie/kelpie mix and a massive Central Asian shepherd. The former does the scouting and thinking, the latter guards. I keep them off the leash around the house/settlement, and often take them for runs-the little one runs out about 30-50 meters to scout, the big one sticks within 2-5 meters to bodyguard. They also escort my 2 1/2 year old son around the settlement when he wanders around.
In general, a big, properly bred dog is a very effective deterrent if trained properly, a liability/weakness if not.
Dogs are very good at reading faces. It's not that they hate hoodrats, it's that they read your expression when you encounter a hoodrat and react accordingly.
A dog trainer recently told me that Pit Bulls were the original English family dog. His was very friendly and he rescued it from a dog fighting ring. I'd hate to see what would happen if you attacked his master though.
I hate pit bulls. "...family dog...". Yeah right. I read a story about a guy who believed all this. He was told, "it's how you raise the dog". So he gets one and one day it rips the the skin clean off his 4 year old son's head. They got it away from him and the son barely lived. Is it so hard to believe that if a dog can be bred to automatically herd sheep or guard chickens that a dog bred to attack and tear things apart might decide to attack and tear something apart?
I had an acquaintance that had two pit bulls and a German Sheppard. He was a dickhead. First the pit bulls tore one of the legs off the Sheppard. Then they tore the other leg off the Sheppard and killed it. Then somehow, not really sure how, they got a hold of a little kid. Damn near killed the kid until the police came up, unloaded a high capacity nine mil into them and finally had to run over them with a police car to stop them. I hate pit bulls. I don't like big monkeys either. Like Chimps. Vicious evil creatures.