Two of my roosters are pushing 2 years old, and the cockerels are 7 months old. Before I had them in their own area they most certainly had crowing contests. Why that stopped after separation, I have no idea. Unless the younger ones don’t have to crow because the older ones are?? Chickens are so unique, just because mine got quieter does NOT mean someone else’s will too.
@Mrs. K is 100% correct, it’s a crap shoot. (I’ve got a RSL who goes broody often, and is a great mother. But everything I read said red-sex links aren’t prone to being broody). You just never know.
I do have plenty of space, is it necessary? No. But my thinking is, if my boys decide to fight it out, they need space to run away. And it’s compensation for not having hens. But it seems to work. So far.
Your precious babies will change. Hormones will kick in. My primary went through about 5-6 weeks of orneriness. He was rotten! He’d bite me, treated the hens like “toys”. But after a month+ he calmed down and became the best rooster. I can pick him up, bathe him when needed, and he treats the hens like gold. He’s always on guard, and stops any hen squabbles. My other “dominant” rooster never went through that buttface stage. He was grumpy when he was born and he’s grumpy now. He’s not aggressive, just serious.
You just have to trial and error a chicken situation especially roosters.
But I wish you all the luck!! And this community is great for helping you out with advice!