On of my Ancona ducks just started big new wing feather growth just as winter hit us. She seems to be managing the cold okay, despite being mid-molt at the wrong time of year. But this morning I noticed a little blood near the wing feather growth, and I'm noticing very prominent blood in the quills--more than I have seen before. Any ideas on what could be going on or what action I should take? I worry about her in the cold, though at night she and her six sisters are cozy in a straw bale hut.