I have a small pen which had 8 young ducks in it. This morning I found a duck head, but the body was gone. I've had coons kill chickens, but there was no "feather bomb" indicating a coon attack. Most of what I read on the net says an owl is the likely culprit. I have seen owls in my trees, so this makes sense. Would a hawk also possibly do this, or is an owl certainly to blame?