Hi Chicken Friends, I have a Barred Plymouth Rock, a Coo Coo Maran, a Buff Orpington and an Americana, all at the ages of 20-22 weeks. They simply aren't laying yet and I guess I am not sure when and if it will be. We put a couple fake eggs in their nesting box, they are on Organic Egg Maker feed and have tons of freedom in their huge coop/run. Does anyone out their have any advice? Much thanks!