Hers are new to the flock.... I'm pretty sure its from the stress of moving. Im having the same problem with my new girlsI have found that something wrong IN their hen boxes have deterred them from laying. Once, just a small beetle had made a home there, and nothing. No eggs for a week! NO ONE laid an egg! Then I find they found/made a secret spot. As soon as I cleaned out their nesting box and got rid of the bug, all back to normal.
THEN another time, mice had gotten in. Them just wandering around, NOT IN my hen boxes, but in ground of the coop and they were all finding other places to lay. Course mine r out n about so cooped hens have few other options... so check for maybe something bothering them in their spot.
Also some recommend one hen box per 3 hens...
Not enough boxes, change in diet, molting, weird/abrupt weather changes, and bugs/ants/mice/wasps/bees/invaders in the nesting area or even coop is all I got on that.....
Best of luck!