This afternoon, I noticed my 2yo EE hen behaving oddly. She was at the waterer, drinking a lot, and showing no interest in treats. She had a milky discharge coming from her cloaca. I checked on her a little while later, and she had left the shell of an egg, along with some white discharge in a nest box. She was sitting in another nest box, but no longer had the discharge on her bum. Is something wrong with her? Is there anything I should do for her? I've attached pictures of what came out of her, and her bum afterwards.