I've never ever had a dog at my aunt and uncle's bark at me. Until this dog. His name is Mikey.
There have been many dogs at my uncle's farm, and this is the second Great Pyrenees that they've owned. When we arrived here to visit two years ago, we arrived at dark, and we knew Mikey, because we'd heard all about him. He did not know us, and he was not entirely happy that we were there, talking to him without proper introduction. This dog took a few days to warm up to us, and even growled at us and barked at us inside the house -- something a dog doesn't do at this place.
My aunt and uncle have these dogs for a reason. They're great with keeping coyotes away from their cattle. About 20 years ago, while my aunt was checking a cow, a coyote howled, spooked the cow, and knocked my aunt flying. The result was a dislocated shoulder. Ever since, there are big dogs like this one.
Eventually, he got to like us a bit. Until the next visit, during which time, I think he'll have to get used to us again.