If these were just the occasional, intermittent, it would not be as concerning. Thanks for uploading these. I have tagged casportpony as well.
I can't think of any other ideas at this point other than what I have suggested.
@Miss Lydia
@WVduckchick
@Orca5094
@Lacrystol
I think you need to have posted a certain number of times first, but I am guessing you have.
This is what the upload photo icon looks like - then you can select the file from your computer to upload.
If you have time and a way to do so, perhaps you could take a photo of her poop. We have some duck poop experts here on the forum.
That may sound weird, but really, it can help to see what we are talking about.
I would also change feed right away. Anything might be in her water? Can she get into any nasty mud puddles?
You are doing so much that should be helping her.
Could it be a fungal infection, like a candida overgrowth? In that case, antibiotics won't help - at the same time, if she has a...