My 2yo Campbell is moulting like crazy and looks so scruffy. She is acting normally but she has never moulted like this before. She has basically lost all of her flight feathers and a good number of her tail feathers too The new ones are growing in. I have never seen a duck moult like this before. She hasn't laid in about a week (since she started moulting) which I know is normal and her sister has stopped laying for a few weeks (since putting my newish call duck outside with them full time) Have added apple cider vinegar to their water and friend suggested giving her more dark greens. Basically is this normal or do I have a poorly duck???