For years, when my dog alerted on the approaching pizza delivery guy, the Amazon delivery driver or the plumber coming to my house, I reassured my dog with words that “he’s working”. These people undoubtedly have had unpleasant encounters with canines. Some of my best friends have wives who prefer the toy or miniature breeds. I know some to openly engage a wrestle playtime with a burly dog. Trades people I have done business with have taken to Dexter and he to them though I don’t have on the interview.
It helps to have a perceptive member of the household who reinforces or balances this sometimes crotchy man’s intuition. And when my wife is not available, I rely on Dexter and Comet.
It's a Dog's Life 