I don't think this will work either. This is okay for a day run. At night they need to have a predator proof coop maybe built and attached at one end of this run. It doesn't have to be big, but any opening needs to be covered in quarter inch wire cloth. I have about 18 chickens who free range within a very large fenced area, but at night they all crowd into a 4 x 4 box with mesh wire in a hole at the top, opening at left and screened door. First picture shows making the coop, second shows the wire on the door. Third picture shows the coop freestanding within covered area. Sorry pictures aren't better. The point is the coop (where they actually sleep and lay their eggs) doesn't have to be big. The massacre picture looks like a racoon or a opossum. Both these kill for the thrill, usually just taking heads and leaving bodies.