I have 3 pullets (14 weeks). They have been in an enclosed run (with roof, predator proof, etc) with a coop inside of the run. The girls have been putting themselves in the coop at night since they were 6 weeks old. They still huddle up on the floor and won't get on the roost bar. However, tonight my husband went out to lock them up (in the smaller coop) and they were all on the floor of the run in the corner. I checked out the coop and don't see anything in it that would spook them. There were a fair number of small feathers on the floor of the run in a spot, but everyone seemed fine. I see no evidence that any animal has been on the outside of the enclosure.
I picked them up and put them in there. They didn't want to settle down to begin with, but when I checked again a few minutes later two of the three were huddled up in the corner (normal spot). To summarize, they've been putting themselves up every night for 8 weeks, but tonight stayed out of the coop and huddled up on the floor in a corner (and they were getting misty rain on them). Any thoughts?