I have 12 young hens that are almost 16 weeks old. I am DYING to start getting eggs. My question is, does their breed determine when they start laying? I have an Australorp, Delaware, Dominique, 3 Cochins, 2 Wyandottes, Barred Rock, Buff Orpington, Easter Egger, and a Marans. I'm wondering if I might possibly start getting eggs from any of them at 18 weeks??? Their nesting boxes are ready and waiting for them! I don't want to buy any more eggs at the store!!