HollowOfWisps
Previously AstroDuck
She sounds like she is weak from too little protein. As they get older the molts get harder and it is absolutely crucial that they have a higher protein feed during their molts. If they do not have enough protein they decline. Layer feed does not have enough protein and they do not need the calcium during their molt. Put her on a 20% all flock feed and start giving her Poultry Cell daily (it has amino acids along with a many different vitamins and minerals).