I have a very upsetting update.Our chicken coop is plywood with a small (8x8) double hardware encased run. It's completely enclosed, the hardware cloth is buried a foot deep all around to stave off the foxes, racoons etc from digging in. This enclosure has a hardware cloth re-inforced screen door, and it adjoins a 15x30 fenced area that has two small peach trees in it. As our girls got fully grown, we started opening the enclosure door and let them free run in the fenced area, as the coop area was too small to keep them in it all day. Yesterday, my husband opened the door as usual and let them out. Not much later, he heard a terrible squawking, and found a hawk (probably the same one that killed the day before) INSIDE the coop area, with one of the Rock girls dead on the ground. Without going into details,my husband took care of the situation. The remaining three chickens were traumatized. I have learned my lesson the hard way, we will just have to find a way to enclose the top of the 15x30 area. Hawks are only doing what comes natural for them, so I can only blame myself. Thank you everyone for your input and sympathy, my heart is very heavy today......