This is my first go with a flock of backyard chickens. They will be 28 weeks on Monday (posting this on fri). So far have not seen a single egg yet. They all look very healthy and are on a layer formula feed. I have the following breeds: 2 Brahmas 1 barred rock 1 GLW 1 Red Star 1 EE 1 Ancona 1 Australorp I know the different breeds mature at different rates, but from what I've read, it seems like at least some of these girls should be laying by now. Is something off or am I just being impatient?