I have four pullets that are coming up on 16 weeks old, two australorps, one barred rock and a RIR. In the last week my RIR has really gotten her comb and wattles and they are red. I can tell they aren't fully "in" since they are still smaller than our 2 year old black sex links, but the growth has been tremendous in a week. My barred rock is just behind the RIR in comb and wattle development and the two australorps are no where near where the RIR is.
Here is my question...should I assume the RIR will be the first to lay given the comb and wattle development? How many weeks after the comb comes in and is red like that will they start laying? I am really hoping she starts in the next month or so since one of my sex links is mid-molt and the three eggs a week I am getting is not cutting it :)