I have 5 pullets which are 22 weeks old today. They were hatched for Mahonri's Easter Hatch this spring. Three are Easter Eggers, which I think I've read are notoriously late to start laying, but I thought I might have an egg by now from my Speckled Sussex or Welsummer. Also, I figured I'd begin offering oyster shell or some other calcium supplement once I saw the first egg (which I expect to be soft). Is that correct, or should I offer calcium in anticipation of point-of-lay? I am really enjoying my chickens, but every time I buy eggs I wonder when I will be able to stop.