Hello all... I've got 18 layers and 2 roosters that are 8 weeks old and recently graduated to a coop I constructed in the barn. Last week I opened up their enclosure so they could go outside and they all stay in the barn all the time. Everyday this week, I've opened the barn up and they come out of the coop but just walk around in the barn all day instead of heading out to the grass. I'm cornfused. I thought they would run out at their first opportunity but I was wrong. Is this normal?