I have 2 Buff Orp. and 2 RI Reds that are all about 28-30 weeks old (all the same age). Three of these have been laying since late August-early September but one BO hen doesn't lay yet and her comb and wattles are not yet developed. The comb is just a small pale ridge on her head and the wattles are not even visible through the feathers. She is the same overall size as the other birds, lives and eats with them, free-ranging in my yard during the day with organic layer pellets always available. Otherwise, she seems very healthy and is even a bit more feisty than the others, not letting me get as close to her as the others but much more willing to peck my outstretched finger. Is this just within the normal range of development? Thanks for any feedback.