I went out to my chickens today and saw one of the hens comb was torn and the upper part is now a bulge covered with clotted blood, I think. I wonder if another chicken attacked her or she did it accidentally. I'm not sure how to deal with it as the blood had dried and she is a hen I cannot pick up easily. I would have to chase her down and she tends to run into things and that may make it worse. Any ideas for what happens, how to treat it would be greatly appreciated.