Two of my plump, Speckled Sussex hens have been attacked in the past 4 days. I haven't found hen #2, that went missing yesterday at dusk only 30 mins after I let them out to free range. In looking for her, I found the feathers from Wednesday afternoon's attack on hen #1. No carcass, no bones, just a circular area of cleanly plucked feathers approx 60 feet from coop in border of yard with taller grass. Have had Coopers hawks problems before, but never with larger hens, only bantams. Ran across a university paper regarding predators and sometimes the feathers will leave clues, like the impression of a hawk beak (?). I'm 70% sure hawk, but seriously wondering fox. An y of you feather experts have an opinion? I can't make anything out, but these 3 SEEM to have a definite crushed spot unlike the others. Thanks ahead of time. Sniff!