Shaky and not feathered

[kiwilady]

We rescued some battery hens. They have all recovered and are fully feathered and laying eggs. All but one. Her feathers have not come in properly and she hardly ever extends her neck, so she is hunched into herself all the time. Now she has started to doze off in the sun, standing or sitting, And while she dozes she periodically shakes her head like she is being irritated. Any ideas what might be wrong?

 

[CochinBrahmaLover]

Try worming her, I dont know what it is, look at her poo, is it runny? Sorry i cant help more, i saw no one posted so i thought i could help what i could