I have 7 chickens. They are all approximately the same age (one is a couple years older), and have all been together since Mar/Apr. They've all gotten along really well. Tonight, my dh has been putting heating tape on our waterer. He came back after a half hour, and Clover, the oldest of the group (by 3 weeks) was bleeding. It's mainly her comb, but a small patch on her side just behind her wing. She's acting normally. She was also one of the higher ups in the pecking order, but they all seemed to get along so well that I haven't really seen them ever peck at each other. It's going to be really, really cold tonight (into the 20s), and I am afraid that if I separate her, she'll freeze to death alone. Is this a small tussle, or should I separate her from the group, knowing that she'd be along in a little tractor that has no heat?