I like to use Nutri-Drench for the chicks as just a supplement, but when any are looking a bit down or have these development issues, its definitely Poultry Cell for them!Welcome to BYC. You may need to give her a little vitamin e with selenium. Just cut a gel tablet and put it on her beak.
I would replace the nutridrench with Rooster Booster Poultry Cell. You can find it at Tractor Supply or have it shipped from Amazon.
You've gotten good pointers concerning wrapping her feet and legs. It is amazing how quickly that can work.
Best of luck with your chick!