Roosters crowing question

[GGGreg841]

When you have multiple roosters, is the crowing done mainly by the dominant/alpha rooster or will they all do it equally? Just curious more than anything, our birds are about 9 weeks old now and three started crowing (or trying at least) last week. I can't have roosters in the city so those three were given to a farmer on Tuesday. Looking at the tail feathers I was suspecting another three are boys, and today (Thursday) one confirmed that with a weak crow! Will they all just crow as they come of age or if I separate the noisy one from the flock for a day or two will the other roosters in hiding be more inclined to come out?

 

[nuthatched]

Tail feathers don't indicate gender at this age.
They'll likely all crow.