Hi! My husband I am are new to raising chickens in our backyard. Our girls are 3 months old. The past few days they have not been coming down the chicken run in the morning. It is getting colder, but I was wondering if they just don't want to come down, or if this is something to be concerned about? They have been coming down every morning for the past several weeks, now they aren't. I have lifted up the side of the coop and they are all just hanging out in there. They don't seem to be sick. I know that three of the four are molting. Does that have to do with them not coming down. It is 1:00 pm right now, and they are still hanging out up above. Thanks!