:agree: It's amazing just how well they can sense the character of an individual.
Back in the late nineties; we had a Scottish Terrier...
"Scottie" came to work with us every day. It took just one day to teach him that the folks coming in, were in fact allowed...
He spent six years laying on the couch, and wagging his tail at our clients. Folks used to stop in just to bring him food...
(The lucky sucker got an entire Roast Beef sandwich one day!! :yikes

In those years; he only barked at ONE client... a man that was very well-know around Town for his mean and miserable disposition...:gaah:
One day; we had a client come in, who had suffered a house fire.
He was visibly agitated. :shocked:
Scottie walked over, and just sat next to him...
Gradually; a hand slipped down and started petting
The poor fellow started to calm down...
That little dog was able to do what we could not... make the guy feel better just by being there!
(And I STILL miss that great companion!)