I use to raise finches and I had a whole clutch with clubbed feet. Now finches don't walk around but they did fine. It was caused by accidental inbreeding. Mother and Son.
Father had died. Finches mate for life. Soooo.....
Just another suggestion.
Good luck and let us know how she/he and you make out.
2 more silkies from the same batch turned out this same way. So you think it comes from inbreeding huh? My friend got these specific silkie eggs on ebay and gave them to me and my daughter to hatch. I'll have to contact her about this. Poor babies, and it is SO hard to put those boots on right.