Is this normal? We have 8 chickens. 4 of them are 8 months old and four are 1 1/2 years. They are all cold weather breeds (chosen with our Michigan winters in mind!). It's been really chilly this week and they have not come out of their coop, into their run, hardly at all! They may come out to get a drink but that is it. They are normally outside all the time. This is my first ever winter with chickens. Is it normal for them to stay in their coop? Do I need to add extra treats to get them outside to "exercise"? Also, they have completely quit laying eggs. We do not have extra light for them at this time. Thank you!!