I've lost three hens during the day while they were free-ranging. Two disappeared two days ago and one today. Both times I found some feathers in the grass but nothing else. I live in the country on 10 acres. I know there are coyotes out there, but they've never come up to the barn area - too much animal traffic with the horses and dogs. There are coons out there, but they hunt at night and usually leave a trail and the carcass. Hawks tend to rip out the innards and leave the body. My guess is it's a bobcat. They'll take them to a remote location to eat. I haven't searched the fields around us, but my guess is I'd find them if I looked. Until I sic my husband on the bobcat with his rifle, my chickens are staying in the pen. Makes me so mad.