Hello, first post on forum. I have been a lurker reading things on the site for a while. Soo...tonite I go to get the eggs and I hear a chirp chirp coming from a nesting box. Seems I must have missed an egg for 20 days or so! Mixed flock but I believe a barred rock mother, seems to be mothering well. 12 chickens plus rooster that should have been a hen! Anyway, 20-30 degrees outside in winter in Indiana, what should I do? Raise one chick indoors? Will other chickens attack? Rooster? Thoughts from the group please?