You have several threads. Is the the one that also has E. Coli infection? Doesn't sound like anything has been resolved in 8 months. You may want to research long term effects of E. Coli infection, this may be the main reason why she's not getting well or has reoccurring issues.I have tried everything over 8 months. Garlic, monistat, copper sulfate, tylan powder , ASV, baking soda, epson salt, cipro, now on my 3rd day of Baytril. Absolutely NOTHING is working. I am at a loss but cannot bring myself to kill her. IDK what to do.
Culling may be something to consider when a bird is just not thriving and you have exhausted all avenues.
I'm sure it's been a frustrating time.