Please help! Weird neuro symptom

Okay so this is not a new saga. I have been rehabbing my poor Pickles who I believe had a severe vitamin B deficiency because her toes were curled. so I’ve been giving her scrambled eggs vitamin water, she finished her meloxicam… Mash with extra nutrients, which seemed to help. She was eating on her own. I saw her drink a couple of times, but I syringe vitamin water on her beak usually once a day. So last Friday, four days ago, she was able to walk for the first time since this all started about 4 weeks ago exactly. This was great.

I had her in a pen part of the day where the other birds could see her, she was improving. She was shaky & weak, but still able to walk short distances. I did notice her appetite wasn’t as good starting Sunday. — So today she cannot walk, her toes are curled and I had to hand feed her a scrambled egg because she was not able to eat, but I guess she was at least trying by pecking the air? Now she’s been doing this pecking the air thing, but not as bad as the video since like the first day this all started.

Anyway, if anyone has any advice or know what the hell is going on or something I should be doing, please let me know. It’s very frustrating for her to regress. I feel terrible that she got sick in the first place.