I recently got my first chickens, three groups of different ones; 3 from one place, 5 from another place and a single one from yet another place. One of the hens is laying who seems to be the highest in the pecking order (and funny enough is one of the smaller chickens lol) is laying an egg pretty much every day. The others are not laying but I was told they were old enough to lay. I'm guessing they need some time to adjust to their new home. How long should it take before they begin to lay?