When I went to let the chickens out into the freezing cold this AM, I say small droplets of blood on the sides of the coop and on tops of surfaces. Also saw some on the back of my white hen. I doesn't really have the appearance of blood flow, more splatter. Everyone seems normal, but they are really cold, so it is hard to tell. This was also the first night that I had their coop closed up tight. Previously they had been able to come and go into their small run. During the day they range in my yard. Because of the cold and noise of the rooster, I have decided to close them in the insulated coop. I don't know if this has anything to do with the problem but want to give all the facts. Does this sound like any illness that you have experienced?