Our 12 hens (1 1/2 yrs old) used to roost on........well, their roost! They've been molting for a while and aren't laying hardly at all. Now, we have several hens who go nighty-night in the nest boxes. Is this normal when they're going through the molt? Anyone else have this problem? What can I do about it? Let them go and keep cleaning the boxes, or take action?