What's wrong with her foot???

This can sometimes be a symptom of riboflavin or B2 deficiency. Posting a picture or two may help. I would start poultry vitamins in her water every day, or use Polyvisol without iron 3 drops daily. Using a ground up or dissolved B Complex tablet would also work to give extra riboflavin. Here are a couple of links to read:
http://www.merckmanuals.com/vet/pou..._poultry/vitamin_deficiencies_in_poultry.html
http://www.thepoultrysite.com/publications/6/diseases-of-poultry/217/vitamin-b2-deficiency

Curled-toe paralysis in chicks

Figure 2: A three-week-old chick
showing signs of curled-toe
paralysis associated with
riboflavin deficiency​

Three, three-week-old chicks were submitted for post-mortem examination from a group of 65 chicks delivered as day-olds, comprising a mixture of breeds. The history indicated curling of the toes under the birds and walking on curled feet, which was confirmed on clinical assessment of the submitted birds which showed marked medial curling of the toes of one or both feet (Figure 2). Post-mortem examination showed possible thickening of the sciatic nerve in the birds but no other abnormalities were noted.
The findings and presentation of the birds was suggestive of curled-toe paralysis due to riboflavin (vitamin B2) deficiency in the diet. Histopathological examination of the sciatic nerves revealed changes consistent with riboflavin deficiency. The birds were being fed an organic diet which had no synthetic vitamin supplementation.
Curled-toe paralysis is an uncommon clinical manifestation of dietary riboflavin deficiency but can occur when cereal-based diets, which can be low in natural riboflavin content, are not supplemented with the vitamin. Unless the nerve damage has been irreversible, there is usually a good response to riboflavin or vitamin B complex supplementation, as reported in this case following B-vitamin supplementation via the water.