I've got two Buff Orpingtons, they're both three months old. I've looked at some other threads about winter weather, but I still worry. I live in Pennsylvania, so our winters aren't the worst, but they're not easy. My ducks love swimming in a little duck pond we put in. Last night it frosted over the top, not a real freeze, and this morning they were swimming again. When i was out with them, I picked them up and I felt that their feathers had little frozen bits in them. Is it normal for this to happen in cold winters and is it okay?