When I went to put give treats to my hens late this afternoon, I noticed that the entire top of my (white) Delaware hen's head was stained with blood. The blood looked fresh, not brown, but even though it stained the entire top of her normally white head, it wasn't sopping wet or anything. I picked her up and took her into the house, and my wife and I looked her over for a cut or something, but never saw one. I guess it must be buried under her feathers or something, in a place that is not easy to see. She doesn't seem in any pain. And even though chickens normally peck a hen really bad when they bleed, nobody was pecking at her. She was mingling in with the other chickens as if nothing was wrong. We took her out of the flock for the night. She's sleeping here in the living room with me, in a dog cage I have covered with an Army blanket. What should we do from here?