Funny... because I'm in the same situation.
In this case, I suggest you feed everyone "Growers Pellet", which is what I'm doing atm. Only problem is you have thin egg shells overtime and this could be dangerous if the eggs break inside the Hen.
I have posted something 1-2 weeks ago and some...
Layer pellets should only be feed from 18 weeks onward when the hens about to lay their eggs. If anytime earlier this could result in internal organ damage due to the high calcium. If I was in this situation, I would feed starter pellets until the point of laying then switch to laying pellets.