We are in Eastern WA and this is our first winter with chickens. We have cochins, brahmas, and australorps. They have a well insulated, heated coop and are let out into the run during the day. We had snow fall a few days ago that has all melted now but today we noticed that all the feather footed varieties have blood spots on their feet. It looks like the feathers are breaking off or being pulled out. They don't seem to be limping or upset. We have a lot of cold weather ahead, what can I do to protect the feathers around their feet? Thank you!