we had girl scouts over when our chicks were young, I had one of the moms explain to me that you have to keep the rooster locked up when the chickens start laying eggs because fertilized eggs can kill you, I asked why and she said because that is what she had heard, dont know who she heard it from, but it must be true. However we had another that thought you had to have a rooster to get eggs, so now I think I know why you have to have a rooster around its so the hens can show off thier egg laying abilitys, but dont let him be with them or you cant eat those eggs they will kill ya. I am starting to figure this egg laying thing out now.