When I went to check on the chickens this morning, I noticed Eden's comb was pale and droopy. She'd just finished laying an egg and the egg was perfectly fine. She's running around chasing bugs, she's eating normally and drinking normally, everything she usually does is fine. My other chickens-Beyonce, Elsa and Beatrice- aren't showing any signs of a pale or droopy comb. Any help would be much appreciated, Rachel.