You have been given some excellent advice. I keep mine in a secure run during the day with access to their coop if they need/want to go inside. I also wrapped the outside of my run with clear plastic to help block the wind. It is not wrapped all the way to the top so they can still have plenty of ventilation. I also keep pine shavings in the run and deep bedding in the coop. If their feet are cold they will usually lay down to keep them warm. This is why I like to have bedding outside for them as well. I do have a de-icer in one of their pools and they were actually chilling in it while the wind chill was 16 degrees today. They are pretty tough birds and their body temperature is higher than ours as well.
