It usually works better to start a new thread with your question, instead of asking in a thread that already exists.
There are many reasons that pullets or hens might stop laying, and it can be different for one flock than another. They might still be laying but you are not getting the eggs (eggs in hidden nests, or eggs eaten by some wild animal, or eggs eaten by the pullets themselves.) They might have stopped laying because of sickness, or something wrong with the food they eat, or short days as winter comes.
