I have recently acquired some silkie hens (auction), and after two weeks they still haven't laid a single egg (4hens). I'm beginning to think I may have gotten some old hens, but not sure how to tell. They seem healthy, fluffy, bright green-blue ear lobes, eating/drinking/foraging. Being fed layer feed with scratch mix. Nice coop that one of my banties lays in regularly. Any ideas out there?