None of my three chickens have started laying and they are thirty weeks old. All different breeds (black australorp, buff brahman, Easter egger). Have looked all over the yard and don’t see any evidence of them laying elsewhere or eating their own eggs. Is this strange? The lady at the farm supply store thought so! If it was just one of them I would assume just a late bloomer but all three seems odd. We live in NC so we have some cold spells but generally temperate climate. Have been feeding them Dumor organic 16% layer crumble, always available to them. I also give them a couple of handfuls of scratch every day, and they free range in the yard. Grateful for any ideas or advice!