@LaFleche do you think this applies even if the females are immature(not laying yet)?Just spend time to oberve:
They will usually prefer to be near him, following him wherever he goes or come running when he calls for treats etc.
They will let him mate without fighting him or screaming.
They will want to roost near him at night.
They will run to him seeking protection from the harassing other cockerels.
@LadyAchee how old are these birds, in weeks or months?
I'm assuming they are all about 4-5 months old due to this statement:
I have 3 roosters going into maturity.