I started off with 11 buff orps, and now down to 7. I have them in a 15 foot by 15 foot chicken run that's buried about a foot down on all the walls. I have chicken wire on all sides and partially buried as well, and a tin roof. But something keeps getting in and biting my chickens heads off. I live in southwest missouri so no weasels. My first thought was raccoon, but I have gone over EVERY inch of the run and can't find anything that an animal could get through. No signs of digging, no signs of entry, nothing. There's not even feathers on the ground suggesting the chicken put up a fight. It seriously looks like someone is opening the gate, walking in, chopping off the heads of my chickens, and walking out. However, all the bodies have been found by the exterior walls. So maybe a coon is reaching in? I couldn't imagine a chicken walking up that close to a coon though.i don't know, it's been going in and killing one at a time the past 4 days. I finally set a trap today and putting up my game cam tomorrow. I moved the remaining buff orps to a more secure location in the mean time. But I need to address this problem immediately due to more chickens coming of age to go outside. So any advice would be great!