I have a 24 week old flock of different breeds. 2 SLW, 1 Australorp, 1 EE, 2 Brahma, 1 Silkie Mix, all pullets, 1 Mixed Roo, 1 Ameraucana Roo. Not one hen is laying yet. They free range, coop at night, and are on SS Layer and Breeder. I thought they were possibly laying in the bushes, so locked them in the coop for 3 days, and still not one egg. Any ideas, or is this normal? My RIR's started laying at 18 wks, but are from a different flock.