My hens put themselves to bed at 5.30pm but it does not get dark here for another hour. Today I went to shut the door and they came out. I gave them some scratch, but they did not eat much of it and just went back to bed. They get up at dawn, which is about 6.30 at the moment. It is not very warm here in March - about 0-10F edited I mean about 0-10C! We would panic if it were 0F round here. thanks for your comments folks. I just wondered why they don't keep eating until dark. They never stop moving for the rest of the day.