I have six chickens in a hen house surrounded by a 4 ft high chicken wire coop. They free range during the day on our 2 acres of pastures. The coop backs up to our dog kennel, which I think has helped prevent predators. I have had this setup for over 3 years with no problems. Wednesday night (well after dark) when I went out to lock up the hen house, I discovered one chicken was not in the hen house. She was not roosting outside, where I have occasionally found a chicken or two. Thursday morning, still no sign. I walked our pastures but found nothing. Friday morning I found her in the fenced-in coop, very dead: head still attached, neck and head meat eaten away, chest ripped open and eaten into, lots of maggots and flies and BAD stink. We have a pine tree that hangs over the coop. Could an animal have taken her into the tree Wednesday night, had its meal and left her there, until she fell back into the coop sometime Thursday night? We live in the country outside of Eugene, Oregon, and have seen raccoons, possums, foxes, minks, skunks, hawks, owls, eagles, coyotes and even a mountain lion. Any ideas would be appreciated.