hi hi, I have a 2 week old khaki Campbell duckling that keeps shaking her head back and forth violently and mucus is coming out of her mouth, almost like she is vomiting. Then she drinks again. This has been happening for at least an hour now. At one point I picked her up and while holding her she did it and the mucus liquid got on my hands. She is making quiet peeps and has finally laid down with the others, but before was just standing. Any help or advice is appreciated!