Ok so my son and I keep arguing over this, so I figured i'd ask people who have been raising chickens a lot longer than me. We live in PA our winters are cold but not severely cold. I have 4 Buff Orps and my son insists that they need heat over the winter. I'm saying they don't but he's arguing they do. He claims also that they won't be happy chickens too haha. So can someone that is an "expert" settle this argument PLEASE??????