Egg production isn't usually affected by feed unless it's really low protein and old and in that case, it would likely stop.
We can't really answer this question unless you provide more information on what your birds get and do.
Treats/scraps? In a coop or free ranging?
What feed works best for being cooped up with little to no treats might not be good for birds that get moderate treats and free ranging. We need find the nutritional balance for how we individually care for our birds.
If it was just the basic 16% layer, a lot of bird don't do well on that, the proteins too low, especially if they get treats or get to scamper around the yard.