I recall reading somewhere that shotguns are still used to take out feral dogs in Afghanistan. I am unsure of how often they are used today in door-to-door, but my guess is they are much-loved by any Navy unit, especially on a boat. I know that the Navy still purchases Mossbergs, so I'm sure they are utilized to some degree. I know for certain the Coast Guard use them on watch.
"Shut up, crime!"