The 16% layer feeds are designed for smaller laying hens in confinement, who are fed nothing else. If your birds are also eating goodies that you offer, and if one or more aren't actually laying eggs, the extra calcium and lower protein feed isn't best.
Here we have males, females, hens laying eggs, and some not, so the 20% all flock diet, with separate oyster shell, is best.
It's important to check the mill date on each bag of feed, so that you can feed it within about two months of milling, for best freshness and vitamin content. old food isn't better!
And you still have pullets, under one year of age. Hens are twelve months of age or older.
Mary