EDITED: You all are so not going to believe this. When I went in the coop to retrieve the yogurt dish that they had finished I saw 3 australorps - What the heck? I counted and all 14 were present. My theory is that she never left the coop (that's why I didn't hear her peep outside,) and hid in the darkest corner near the nest boxes where I couldn't see her. Perhaps I even threw pine shavings over her. She must have been frightened by her bold act and my jerk reaction to something landing on my head. ORIGINAL POST: I was preparing the coop where their brooder is for them to roam about inside the coop as they were starting to fly against the roof of the brooder and I didn't want them to hurt themselves. I had made a ladder for them to come down, hung waterers, put food down, hung an additional heatlamp. The chicks were very curious watching me, but , as I thought still safely locked up in their brooder. Lo and behold as I was spreading the final load of wood shavings I felt something land on my head. Not expecting this, it startled me and I jerked my head. The people coop doors which do not lead into the run, were open, she flew out. I think she got out through a little opening in the hardware cloth that I had made to hang a 1/2 gallon jug with a nipple for them to drink from. Maybe she perched on the jug and crawled out that way. I have put two waterers near the coop hoping to lure her back. There is a lot of vegetation and places to hide, I can't find her unless she comes back on her own. It's around 70 degrees today, she is 3 weeks old. Of course there is a whole lot of predators, but I'd hope that she comes back to the coop before dark and that danger becomes acute. It's interesting that it is an australorp, usually not the most curious of the bunch. I'd have expected one of the dominiques to do this but not the australorp. My DH says she's the silent, planning kind of bird, hatches a plan and waits patiently for the opportunity to arise. I can kick myself that I didn't close the doors, but I hadn't expected her to crawl through that little hole. What else can I do? Put food out? I thought that might not help much as she'll have plenty of wild food to find.