PLEASE NOTE I HAVE ADDED MORE ACCURATE PICTURES of the SET UP on PAGE 5 of this post THAT were taken today 10/16/10, thanks for your help. I would also like to add that just because I said I didn't hear an alert doesn't mean there wasn't one as I was in a different coop and sorry for any confusion. I HAVE TRIED TO bold or put in CAPS my additions to this original posts for those of you who have been so helpful, thanks. I went to go lock coops right before dark and found the screened door was part way off as I had forgot to put the heavy thing I lean against it on that day but it still usually stays on but the bottom was on and it was tipped open at an angle going upwards so I knew something may have gotten inside. I counted and all were well but one of my 4 month old araucanas was dead on the floor of the coop and it's vent insides all missing but no blood or feathers around in the coop. This group stays in the coop as their run is being built now. I put the door screened in poultry fencing up during the day to give them extra light and air and has always been fine before. I read the thing to read before posting and all I can think is maybe weasel? DO they come out in daytime as in late afternoon OR I AM ADDING HERE THAT THIS COULD HAVE HAPPENED RIGHT BEFORE DARK When I discovered IT. I did hear one scream a little earlier that afternoon but I was holding my peachick and thought it may just be a fight among them and couldn't check and then heard no alert so I forgot about it after pea was back in her crate. Here is a picture today taken from outside the door. I also tie it in place, now I lean several heavy things against it until I can make it more secure for them, there is a tunnel underneath that something dug so I blocked that as best I could too. Any thoughts?