I've done some various handyman work at a home a few miles from mine over the last two or three years. They have a Rottweiler appropriately named Diesel. If he does not know you and is not restrained,he'll go Kujo on your hide. Once he gets the nod that your are ok from the owner,he'll will be willing to accept you as long as you act properly.
She's from NC,he from Oregon...black folks,Christian,well educated and successful.