I have recently got 2 new black sex link hens that are laying. My rooster is now a happy man. When I got the hens, they were already laying. The eggs are not fertilized. I want chicks. My question is how will I know if the eggs they are producing are fertile chick eggs? Is there a timeline? Also, this new hen is not sitting on her eggs. I think she is used to them being collected. If my rooster and her mate (I think so already) how long does it take for a fertile egg to be produced? Will she sit on those? And finally, my hen laid 2 eggs today. I left them. How often should they be collected? How will I know not to collect a possible fertile egg? Thanks!