Help, We have a flock of 9 laying hens, and one of our white plymouth rock's gave us an egg that had blood on it. (egg completely in-tact) When we examined her, she had blood on her as well, and the only other indication that she's not at 100% is that her comb is slightly flopped over. Is this a one-time or some-time anomaly, or is this something we should be concerned about?