Hello! I’m looking for some advice. I have 6 hens, all about 1.5 years old. I live in upstate NY and it has been a cold winter, often reaching negative numbers at night. Almost every night I have to put a few chickens inside the coop at night. How can I get them to all go inside? It’s always a different combination of who goes in and/or stays out. For a few months they all went in every night. But then when I put a tree roost in the run this issue started happening.