New to chicks, my flock is 3 RIR, 3 golden comets, and 3 barred rocks. They are about 20 weeks old, Ive had them home for 2 weeks. Last night I noticed one of the comets had some blood dripping from the back of it's comb right were it meets the skull. I watched and didn't see anything picking at it and about an hour later the blood was gone. So I figured it might have hit its head on something. Today I noticed one of the RIR had blood coming from the base of it tail, basically right were the ends of its wings lay on its back. The pictures below won't be much help as I was alone and she was not cooperating. I didn't see a bunch of feathers like she is being plucked, curious if there is something I should check or watch for?