It may take up to a month before they get going again as long as they are healthy.
I don't know where you are or what condition your new hens are in but I would think 10 hens in an 8x8 barn would not be in the best of shape. I'm guessing red bottoms and feather loss if not worse. Given their new surroundings, new available nutrient, and the time of year, they may just decide to go into a molt
weird because 4 years of caring of hens and never seen one molt even in my town