Picture added at bottom - graphic. Broad daylight too and right next to the run. We have had our barn cats kill 2 weasels in the past few months. Could it be the cats or a weasel? The hen was found under a really think bramble rose bush with just the neck chewed on. I found the rooster and 3 of his hens in the coop and 2 other strays came out of the woods next to their coop. Then over an hour later 3 other hens (whom I also thought were killed and taken off) came back. They are all (obviously) really acting strange and they were all hiding in the woods. I forgot too, all of the feathers we plucked right next to the hen and just a bald and eaten head and neck (nothing else touched).