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We had a two-week vacation planned, and a friend’s 22-year-old child agreed to pet sit for most of our trip. My brother was here for the first couple of days because it was Thanksgiving weekend. He let us know that our dog was growling at the pet sitter since she was clearly stressed. My brother took her to the nearby park with some of the neighbor dogs and she warmed up to the sitter. My brother stayed to transition to this friend’s child in person because the dog was still stressed and growled at him occasionally.