Hi, I was just wondering how i can tell when I should leave the eggs under my hen for her to hatch. She has been laying 1 a day so far, I actually just watched her lay one this morning. She lays in the same spot for about half an hour after she has laid. When can I tell that she is laying out an egg to hatch, vs just an egg that we would eat? Or are they the same thing? Do hens lay multiple eggs at one time if they are fertile?