When your pullets reach point of lay (POL), they will be red in the face, wattles and comb (Almost sunburned looking) and may or may not squat for you if you approach them. With my first flock, I reached in to pet my Black Sex Link and she immediately squatted! You'll be in no doubt what they are doing when they squat for you. Keep in mind that different breeds start at different times and the production breeds tend to start around 18 -20 weeks, sometimes sooner. I would say yours will probably start in late November or December. Mine are getting ready to lay and they were purchased as 3 day old chicks in early June.