Glad to hear she's eating but in reading this thread, it sounds like she needs vitamin supplements to help a possible deficiency.  This could also be why she stopped eating.  I would get some Nutra Cell or Poultry Drench and put some of that in her water.   She needs to continue eating her grower mash as that's got what younger chicks need until they lay eggs.   She's suffering from something still if she's not walking and the most obvious thing has already been suggested.  It's only going to get worse if you do nothing.