They generally molt in the late fall or winter. I have two hens that are sisters and hatched the same day (Jan. 15, 2014)... one molted in October and the second one just finished molting this week. My first to molt was in early September.
I have a broody raising a chick right now. Does anyone know if being broody will affect her molt? I've noticed a lot of tail feathers from her in the yard this past week. I don't have a rooster and none of the other girls are loosing feathers yet.