I'm baffled. Chickens are about 9 weeks old. We have a large metal shed with everything they need (hay bedding, roosts, ladders, food, water, nesting boxes), as well as an attached large (10x10) dog kennel for a run. Not only are they opting to sleep in the run in a big pile at night (vs going inside), they also stay out if it rains after dark. I just had to put my rain boots on, remove sopping wet chickens from their heap in a mud puddle, and hand carry them into the coop in the dark. Any idea why they won't seek shelter? They DO go into the coop if it rains in the daytime. And they always pile up in the same spot - by the gate that opens out into the yard. Thanks, everyone!