I looked through the thread & didn't see if a post stating how old yours were, katekearby. I may have missed it. How old are your pullets? I don't know if started pullets are the same thing as point-of-lay pullets. That might make a difference, so hopefully someone can address that.
Mine all hatched the same day, but one started laying a full month after the first one did. The first one was five months old.
Judging from what I've read on BYC, most of us give them free access to food all day and it seems we also spoil them sweet with healthy treats. Maybe those are just the threads I read though.
Either way, try not to worry too much. Just like almost everything else, that's much easier said than done.