Congrats, folk! PICS - NEED PICS!!!!!
Oldchurch - I don't know that you can really pinpoint a date; IMO, look at them for type when a minimum of 6 months; if they are looking good in type and are a close match to the standard, take them! I WILL say that my pullet was 7 months when she placed reserve champ american at the APA show I took her and a hach mate to - I spoke with the judge at length afterwards, and he told me she just simply hadn't "bloomed" yet, and that if she'd have been a few months older, she likely would have taken the class. It depends so much on the time of year hatched, what line they are from, etc., as well. It's priceless to be able to speak with the judge after a show, and most of them are more than willing to share details of why they placed your bird where they did. As far as whether they are red in the face due to laying, I don't know that this means a ton to a judge; they can tell by their physical exam whether a female is in lay or not & will judge her accordingly.