I just got some chicks in June from a friend and I have one hen and one Rooster. The hen is due to start laying but she isn't. My friend and I have combed the yard for eggs many times and have searched all hiding places. Three times I have heard "the egg song" ,which my friend says is a sound they make when they are laying an egg, and both of us have run to the coop and found her walking out but there is no egg. I don't know what is wrong. I started them on layer feed a couple weeks ago, there is a heat lamp in their coop which is on all the time, and they get the run of the yard all day. Does anyone have a clue what may be the cause? I have read the article on no eggs and I don't know what could be the cause... please help! Thanks.