There are some things you can do make a rooster crowing less likely. Although not guaranteed to stop crowing altogether this did work for me. In order for a rooster crow he needs to extend his neck (sort of hold his head has high as possible) If you have his perch at a height that gives him no head room he can't crow whilst on the roost. This meant that mine didn't bother until he was out of the henhouse in the morning and as I didn't let my brood out until about 7.30am he wasn't crowing too early. Of course he could stand on the house floor and crow but as I say he didn't bother. If you collect the eggs every day and store them somewhere cool you will not notice any difference between a fertilized or an unfertilized egg.