I realize that my 15 chickens are at 21 weeks and it's not entirely unusual that no one is laying yet. But I'm paranoid that they have started (or will start) but will eat the evidence before I find it. I don't have time to chicken sit to see if anyone is laying, and I can't really hear them from the house. So am I paranoid? Will they just lay the eggs and everyone will leave them alone until I find them?