They don't crow every time they want to mate. They crow when they want to mate and don't have any females around, like when I raise meat birds and have 30 roosters together. I usually have 6-8 roosters and 30+ hens. Some days I don't hear a single crow, but my eggs still hatch just fine. Also fertility will last up to a week in these birds, he only needs to breed her once ever 5-6 days for the eggs to be good to hatch.
the petseller tell me that in one month it is going to start to lay eggs
normally at what age do they normally start to crow
only 13 day left for the hatching day 