Could be vitamin deficiency or hereditary. I would not breed this bird until you can find out if it just vitamin deficiency. She should be fine for eggs and she will likely manage her difficulties well regardless.
You can fix curled toes when they are very young but it's too late at 8 weeks. I have a couple EE's with severe curled toes and they are fine. It doesn't seem to hurt them at all so I am not worried about it. I have them for eggs only so I'm also not worried about breeding...not that I plan to hatch out her eggs anyway.