I lost one of my hens over the weekend. I thought I had built Fort Knox! I have welded wire around the bottom (4 foot wire) buried a foot in the ground. Then I wrapped poultry wire to narrow the size of the holes. It goes up to the roof (7 foot). I have bird netting across the top, along with a plywood and shingle cover on one end with plywood sides to break the wind and rain, where they sleep. Something killed my smallest hen, ate her head, and left her. I found evidence of where something had tried to pull fethers thru the fence in a couple different places. But, I could not find any holes big enough for a critter to get thru. Has anyone here had coons kill them by grabbing them while they sleep thru the wire, pulling a head thru and eating it, and then that's it? Where I found her laying was in a corner by the plywood, away from the fence though. Not where the feathers were! I am confused as to how the bird got moved so much inside the pen unless the other chickens did it somehow. I did put out a live trap and catch a young raccoon the first night, but I still can't figure how he could have done it. Hmmmm.