Besides making a shoe out of tape and riboflavin (b2) for the curled under toes and leg issue, you can place her in a small wine glass, shot glass or padded cup to try and stand supported, which will help strengthen the legs and keep her upright. Offer chick crumbles, some wet ones, and egg yolk along with water. Placing a little bottle cap in front of her that hold food or water helps. Chick slings may be helpful to get her in front of food as well.