My chickens are 13 weeks old now and they have been in their run/coop since they were 8 weeks old. Almost every night without fail all or some of them are huddled by the door to the run instead of inside the coop. I have an automatic door that closes at 8:30. I've gone out just before the door closes and carry them to the pop door. Last night I decided to wait until the door was closed to see if they would have gone in on their own. Nope, still huddled in the dark by the run door. I've tried to lure them in with scratch or treats but they all just sit there in a pile. Any advice?