My duckling's eye is slightly smaller than the other eye and it also has a mark across it. There is a picture below of it. She keeps it closed most of the time but otherwise it doesn't seem to be bothering her and she's very healthy and active. Should I do saline solution? How much salt? I don't want to further damage her eye by adding too much salt. EDIT: I can' t post the picture yet since this is my first post.