The girls are 18.5 weeks old, but only 2 are showing signs of maturing, the Barred Rock and Rhode Island Red. Big combs, red wattles, red faces. Now, the BR squatted for me this morning! YES!!! Finally!!! Nestbox in place: check Golf balls in nests: check Wattles and combs growing: check Squatting: check Eggs: SOON, I hope! Waiting, patiently waiting.