Sorry to bother everyone but I work near a lake and the duck that I love to come and see appears to be looking really sick. Her beak has changed colour from a yellow - orange to a very pale yellow and her feathers look like they have been plucked in some areas and are quite ruffled, slightly pinkish and lack the shine/ coat it usually has. She is still quite active however I am worried she might be sick. Is there any chance someone can look at the attached images and let me know what she might have / how to ensure she gets better? Thank you in advance!