I am planning in the future to get some some more hens for eggs, but I'm not sure if I want to order chicks, or go to the farmers market for some already laying adults. My concern is, the adults from a farmers market may be older and about to stop laying. Is there a way to tell the age of adult chickens? I don't want to end up with frying pan age, if you know what I mean. Otherwise, I may just order Australorp chicks.