I'll give those ideas a try as well, @Wyorp Rock . Thank you!
One question about chicken saddles, @BullChick - these protect the chicken's back, correct? Most of the bullied hen's molt is currently the breast area. Is it still worth a try?
My 3 chickens all went into molt a little over a month ago. Lately, one of them has been more obviously molting, with visible pinfeathers, and it's become clear that the other two are bullying her - kicking her out of the hen house, chasing her away from the kitchen scraps I bring to the pen...