I was wondering if anyone can tell me why one of our hens has been "booted out" of the flock? I noticed a few days ago when I closed up the hen house for the night that one was missing. The next morning I went out and found her outside the pen looking healthy, but why did she stay outside? This is not normal. Since then( it's been about three nights),she hasn't been back with the flock, but she comes back once in awhile to visit. I have no idea where she's sleeping; what's going on? Any ideas?