She's not laying age yet, so my first thought beyond that is vitamin deficiency. I would start her on B-complex, about 1/4 to 1/2 twice a day. Try just give it to her unless you can put it in or on something where she eats the whole thing. I'd put Poultry Cell or Nutra-Drench in their water a couple of times a week.
Do you have them eating all flock or chick crumbles? She should not be on layer feed yet.
I don't give mine much beyond that so they eat their feed, but I'm not against treats whatsoever. Mine have pumpkins all over the yard right now. In season, kale, cobs of corn, tomatoes, etc. For scratch they get Kalmbach's Henhouse Reserve, and Kalmbach's Flock Maker crumbles is their main feed, fortified with 1/2 dose Rooster Booster granules. It's a huge treat to them when I wet their crumbles into mash.
Being blind by there fuzz/feathers doesn't stop them from walking. For the worst ones I use hubbies electric razor and go around their eyes. I don't show mine, just breed them for others to show.