I am at a loss either she is sick but don't think she'd be laying eggs is she was sick or she is feeling broody and this is how she is acting till it hits full time or if something else is going on.
Keep a close eye on her especially the eating part they can go down hill pretty fast with out us even realizing it till it's too late. So you might want to do a hands on and feel her weight check under those feathers for breast bone does she have good body weight or does she feel skinny? Eyes and nares clear no raspy breathing. Not saying what your seeing is illness but still good to be able to check these things off.
