HELP NEEDED SOON
Featured Stories on BackYard Chickens
Could she have gotten in to something toxic?
Can you take photos of her eye?
What kind of bedding do you use?
Have you tried to irrigate it with a saline solution?
- Overrun with Runners
Looks like there may be some infection setting in, and I would get the duckling to a vet.
Meanwhile, like Kevin565 said, rinse the eye a few times a day with mild saline.
Difficulty breathing - does she have access to water to rinse her head frequently?
I would get her into a tub of brooder-temperature water - at 4 weeks, I think water that's 75 to 80F would be fine, no soap, just let her wash up and snoot water through her nares.
I would also put a teaspoon of apple cider vinegar per quart of drinking water in their drinking water - don't use a galvanized metal container for their water if you use ACV, it can leach metal.