Poops! Yes!
I hope to read she keeps improving. I too think there's no reason to believe that her neurological problem is limited to her leg muscles, given the gizzard is made up of a bunch of muscles, and there on down could be affected too.I know so little about this, but was curious to read about B6 deficiency contributing to "gizzard erosion" (don't know if she has that, but if her gizzard isn't working right, could that be why?) and seeing the bit about leg maturation and crippling.
https://www.merckvetmanual.com/poul...ltry/vitamin-deficiencies-in-poultry#v3348035
Gizzard erosion has been noted in vitamin B6–deficient chicks. It can be prevented by inclusion of 1% taurocholic acid in the diet, leading to the speculation that pyridoxine is involved in taurine synthesis and is important for gizzard integrity. In pyridoxine deficiency, collagen maturation is incomplete, suggesting that this vitamin is essential for integrity of the connective tissue matrix. A chronic deficiency can result in perosis, with one leg usually being crippled and one or both middle toes bent inward at the first joint.
There's an adenovirus that actually causes gizzard erosion itself, but there's nothing about associated leg weakness.
I guess that is the difficulty with being a good flyer...is a gentle take-off for a short landing! 
, but I truly needed to go to your Primer article to find something so I clicked on it (in your signature), but it gave me an error, so perhaps something wrong with the link?
