hmmm....don't buy this story. my theory is someone got a little over zealous with their wing shot and tagged their buddy in the back a la dick cheney. i'm very cynical lately.
It's happened a few times where untrained dog in duck blind jumps up and triggers a weapon or knocks it down. That's why I won't be in blind with undisciplined dog. If story happened as stated fault person who put loaded shotgun on ground.