ok, she will more than likely improve after molt. a few other things that cause it, just for your information. mites and lice, lack of oil or fatty substances, internal parasites may cause it to, im not sure. some people claim a lot of corn in the diet may cause it too. if you dont think its any of these that caused her to lighten up, try adding some black oil sunflower seed to her feed; if you dont already.
i dont know about GA but here in Ohio weve been having some strange weather this year. if youve had several spells of wet then dry weather, that can cause their feathers to dry out.
im far from an expert here, just trying to pass on what ive encountered along my own journey in the chicken world.
We've been having wet and dry spells.