I have no idea what happened to my hen. The flock I have has always been very docile and no one picks feathers or anything. Today I noticed that a water dish my chickens sometimes drink out of had blood on it... and later, noticed a very bloody-headed chicken. I can't tell if someone bit her comb or if she somehow injured herself, but she is still bleeding a lot and I have no first aid knowledge. How do I stop the bleeding?!