Not knowing anything about All Stock feed, I googled it. Every brand I looked at was 12% protein.
This is MUCH TOO LOW for laying chickens. Or any chickens. Layer feed (usually the least expensive and lowest % protein) is 16%.
I can guess that your chickens began laying due to increases in...
This is what I am going to do, after I get a bag of "some brand to be determined" chick starter/grower from my local TSC. I'm going to get a small bag, feed it for as long as it lasts (probably 1.5-2+ weeks...?) and then switch back to my usual Kalmbach 20% Flock Maker.
I will post pictures of...