Thanks again Ridgerunner....you make several good points. We're lucky that we have the space and supplies to keep them separated. It's a tad inconvenient but we're managing. They free-ranged again today with no problems (no blood), but we didn't let them stay together in the coop.
I'm gonna give it a few more weeks before I move Ruth, the victim, back outside with the others. A couple of modest adaptations to our coop will allow her to be sectioned off but she'll remain separated by a wire mesh barrier...hence the coop-in-the-coop idea. We have wanted to do it sooner, but until very recently we've been dealing with many
-15 degree days and nights, and she had been housed in the basement since Christmas after being sick. I just didn't have the heart to stick her back in the elements after getting her used to the warmth of the house....even if she does have a lot of feathers and down. We're used to having her inside now ...it's like having a parrot. As soon as the temps stay in the high 20s and 30s regularly at night, I'll put her back out. Hopefully that will be in a few weeks.
The two outside chickens both pick on Ruth equally. The Plymouth Rock (Mayme) is the largest and definitely in charge and she also picks on the other RIR (Dorothy) that shares the coop, but not as badly as Ruth. Dorothy's comb is pretty gross...small and scabby with patches of white (frostbite?) but she holds her own against Mayme. I have tried to keep Vaseline and Neosporin on the combs to help with the frostbite and pecking wounds.
I read in one of my chicken books that the comb is the chickens means of controlling body temperature. It would stand to reason that the comb would be larger in the warmer months, the warm air being cooled by the comb's dense network of blood vessels and circulating the cooled blood to the rest of the body. In the winter here, the combs have gotten smaller and have turned whiteish here and there....makes sense...they need no cooling since its already freezing out. Ruth is in the warmer basement environment, so her comb hasn't shrunk so much. The book goes on to say that the hen with the largest comb can often become the leader and will even go as far as crowing like a rooster. It's just my own theory that the comb size might play into the politics, but I think it makes a certain amount of sense.
I'm hoping for the best this spring...it sure will be nice if they could all stay in the same tractor/coop again. If not, I guess we'll deal. Thanks again.