I will look for some info for you.
I think a multi vitamin - poultry version - would be best, perhaps with electrolytes. It ought to give her a boost.
Your using Veterycin too for her eyes? also Poultry Nutri drench is a good vitamin
The Vetericyn that Miss Lydia mentions comes in both a wash and a gel. When we have eye issues in our ducks, I wash the eye out thoroughly with the wash, which is like water, them use a couple of drops of the gel over and around the eye. The gel clings to the area where it's applied and lasts much longer than the wash.