From a slightly different perspective, my DH does service work for a living and he has said that many of them are standoffish but not aggressive towards him, a stranger. He's met a few friendly ones, but they're not like your typical "here let me help you carry out all my owner's belongings" Labrador.
And he said, yep, all the owners have said that they have skin issues. (He likes dogs in general, so talks about them with their owners a lot.)

And he said, yep, all the owners have said that they have skin issues. (He likes dogs in general, so talks about them with their owners a lot.)