Did you read the article or just run across the recipe and decide to just use it?I’m assuming she has sour crop and treating her as such with ACV water, kefir and going to try this mixture from a BYC article:
Sour Crop (as in the article) is treated using an anti-fungal/yeast medication like Nystatin, Miconazole or Clotrimazole.
Doughy Crop is treated with the recipe you found. Can you figure out which one she has?
Often, a Doughy Crop can be Sour, so if anything, I would treat as both. Give an antifungal and administer the recipe, just space them out.
https://www.backyardchickens.com/ar...ntion-and-treatments-of-crop-disorders.67194/
The white in the poop is urates. She's dehydrated. Get fluids into her. I would give some electrolytes if you have them.
Get some Calcium into her too. The beauty of using a pill is you pop the pill in the beak and let them swallow it. You don't rely on them trying to eat it in food. Most birds that are unwell with crop and reproductive issues don't eat very much at all, so hiding meds in food is not the best course of action.
Hydration, Calcium.
Consider deworming if you haven't done so.