I have a farm in Virginia. I had nine hens in Feb. of this year. I now have two. The weird thing is their coop is an Amish made building on a foundation with a very secure floor and door and there have never been attacks or disappearances at night. What makes me suspicious is that hens only disappear when I am not home and sometimes in the day. One at a time over weeks and today, three at once, in the daylight. I have never, ever found a trace of any of the birds and no blood, feathers, corpses, nothing. I was only gone two hours today when three went missing. I am beginning to think that humans are involved. They were free-ranging but their night quarters is tight with bird netting over the coop yard and a closed up chicken house. I have plenty of cover and several large animals (goats, donkey, horse) where they range. Dogs are never out without me and always in fenced area. I am putting in cameras tomorrow and periphery of pastures, barns, home, etc will be fully fenced shortly and I am locking the front gate to the property. There are no roads back here...only one gravel road in and out. What do you all think? Is there any predator that could do this that has four legs?