My Bouvier de Flanders/ Irish Setter cross that weighed in at 150 lb passed away a couple years back, but he only 'looked' the part. Have seen many a door to door salesman jump my porch railing when his head came out the screen door's window with a woof though. LOL!
I am 6'4, 210 so standing there 'playing' with a 5' pipe in my hands, (as a pry bar for the door you know now...) well....
I save the gun for when it's really needed...
Mike