Up until last summer we had never had a problem with ravens. They are like invading vikings!!
They would wait till darrell would head off to work then the flock of them would sneak attack. Started off with just a couple, then they started bringing their friends. What a racket they'd make after plundering. They were going in thru the coop door and stealing the eggs from under my Cochin girls. They also got all of my ready to hatch duck eggs.
So, on Darrell's days off, we got up early and he drove down the drive, parked it, then snuck back up on foot with the shot gun. Boy were they surprised! Blew one away and nailed it to the side of the coop in plain view right then and there; stopped having problems with them after that. They flocked off!
They are starting to come back for fly byes though, so think they'll need another reminder.
If you don't want to see the corpse you can attach it to a wire and throw it up onto the roof of the coop.