Have three chickens 19 weeks old. A few days ago introduced 3- 18 month old hens. Now the younger chickens spend all day in the coop and won't come down to the pen. At first I thought it was the rain, as they usually stay inside when it rains, but today is a beautiful day, and they are still up there. I tried to shoo them down without success, although I guess I could with some help. Am worried about them dehydrating. If I put water up there, would that be helpful or just encouraging them to stay? Should I make them come down or just let them decide on their own?