My adult flock has been on edge, very jittery, since one of the flock members was killed by a hawk a couple of weeks ago. I have spent alot of time with them since then and they seem to have mellowed out a bit. They've even started foraging a bit again, rather than staying hid up in the bushes all day. Then a new behavior started today. I opened their pop door as usual this morning, but instead of tumbling out and making a beeline for their morning scratch as they usually do, not one of them came out. They are all standing at the back of the coop, as far as possible from the one open window (covered in hardware cloth) as they can get. Finally, Lilith came out, grabbed a bite of scratch and then ran right back to the coop. A little while later both Lilith and Maggie came out, but they ran straight to their favorite bush. Now they are both just standing there under the bush and Maggie is cackling like crazy. I have checked the coop out thoroughly, including the nestboxes and under it. I have visually inspected every single tree in the garden/chicken area, slowly from top to bottom. Nothing. I am pretty good about spotting anything out of place. I spotted a hawk in a field yesterday (far away from the farm), that no one else saw until he moved. This is the first time in their 2 and a half years of life that the adults have ever refused to leave their coop the minute the door was opened. I can't figure it out! Input? It's raining and I really don't feel up to standing outside with them all day, but will if I have to.