No. 23 weeks is still normal, some start later....some of mine started at 20-22 weeks, some at 26 and one decided to wait until she was over 36 weeks old. You can put nest boxes up if they look like they’re getting close (you may notice squatting when you approach, combs and wattles red, egg song etc). I made boxes available and placed wooden eggs in boxes. The girls supposedly think the presence of eggs indicates a good nesting place . I only had a few eggs laid outside the nesting boxes/coop. Mine will run to the coop even when loose in the yard, lay and come back out. If your girls don’t roost you may want to put them up on the roost when it’s dark, may have to do it for a few days but it usually works