But I completely trust a dog if they don't like a person.

One caveat: otherwise sweet natured dogs of all breeds [German Shepherds, Pomeranians, Dachshunds, Samoyeds, Border Collies, mixed breeds] get very barky and also incredibly aggressive at me on a regular basis because they don't like my power-wheelchair. Some dogs dislike the sound the motor/engine makes, some dogs dislike the shape of it, or the fact that it has so many wheels.

So, there's that.