Can you get VetRX I understand it is good for respiratory issues. Do you have other poultry/ducks? A good bird probiotic would also help with the diarrhea
@Naziha I know you probably do but I have to ask does your duckling have a bucket deep enough to dunk her head into to clean her eyes and nares? The diarrhea can be from the antibiotics they kill both bad and good bacteria, A good bird probiotic added to her drinking water may help with that...