It should be pointed out that when you take a rooster out of a pen for breeding, it causes the remaining roosters to redefine who's top rooster and a whole royal rumble when you put the breeding rooster back in because they see him as a fresh rooster again. Unless you have just a couple roosters total...or add a whole bunch at once to lessen the brunt across the numbers...it's pretty hard to add just one back.
I'm a rooster collector...
I'm entertaining several roosters;
16 roosters, different sizes, penned separately from the hens but together in the chicken coop
3 OEGB and 1 young rooster with the flock
4 roosters with the male rabbits
5 roosters with the female rabbits
2 that just made it clear they were cockerels
1 that won't stay with the female rabbit bunch
and about 9 cockerels just sprouting combs
Holy...that's about 40 roosters. Hadn't actually added that all together...
Good thing I get more pullets than cockerals at hatching. A few roosters will be going...(for those with your jaw on the ground...lol!!!)
Main thing is to keep their spurs trimmed and blunted and nails trimmed smooth so they can't hurt each other or the hens.
Use vertical space.
In my case I'd let a few roosters out because I have that many hens...easier to reintroduce the roosters back "the bachelor pen."
But I'd never let a huge amount of roosters out...the hens can't take it, even with free ranging. I free range.
And yes, the roosters will still fight if they don't see hens. At least mine would.
There will also be much crowing.
(I like the crowing)