Do not be deceived by appearances. He is a lunatic.
There are aspects of Virgil that are lovely and sweet, and aspects that haven't changed since the day he first arrived in our home, put his head in my boot, and peed. Let's just say that he has his quirks, and one of them is a hatred for any and all mail carriers that is - and I mean this with zero exaggeration - completely insane and utterly pathological.
I don't understand it. He sees the SAME. PERSON. EVERY. DAY. And yet every day (EVERY DAY!!!) he reacts to the sight of our mail carrier like she is one of the horsemen of the apocalypse, and has just arrived on our doorstep with the intention of making him into a throw rug. He somehow grows six sizes larger and turns into a horrifying attack creature, snarling and spitting and clawing at the window, absolutely desperate to do something to her that definitely involves her death. I even know when she rounds the corner at the very end of our block, because he has a very special bark that he reserves only for her, and what that bark means is I WILL END YOU, LADY, IF IT IS THE LAST THING I DO.