usually roosters wont grab the combs they grab the head,I wouldn't keep a rooster who causes injury.None of my hens have been injured so I just let nature take its course,its how they repopulate.
That instance was a learning process for me.. about not having my stag pen done in time and how they can suddenly start mating or other changes over night and will before 16 weeks in MANY cases. Trust me, I had plenty of warning. Projects just seem to take longer than anticipated.
At what age (approximately) do you think the boys have all their cards on the table? Or in other words their long term behavior/attitude set? Towards the hens, humans, and say other young, integrated until processing day, stags? Obviously the stags do reach a point where they may be willing to challenge the dominant roo in the pen and my guess would be less dominant roos before that if you have more than 1 keeper roo. And in reality the keeper roo may even teach the young stags some manners I suppose. (Thought it would be nice to cirle back to rooster flocks/stag pens

)
There are so many possibilities and variables IMO that it's hard to predict the long term outcome of keeping a rooster flock (or any flock really). For example.. will you continue to say hatch or buy straight run and be integrating new ones until your at max capacity? Only keep what you have, buy pullets and allow space for future oops boys? be a softee and take in other people's cockerels until you can't? Provide a separate pen for a bully who can't live in peace with the other stags? How many pens are too many? Is there any end?
I will say that my boys don't get the same amount of time spent with them as my hens do. But I like all my animals to be treated equal. So with that time exception, i care for the boys the same, good food, good pasture, safe housing. So far other than my lap boy, none have been aggressive towards me but they have varying levels of aggression towards each other...
So another idea for keeping a stag pen/cock flock might be a time out box/kennel! Yes, I like that idea. For the boy who suddenly decides he's on one. A chance to cool his jets for the aggressor, the one who is relentlessly chasing. Those things don't usually go on for too long but sometimes I do feel the need to intervene and can see how a look but don't touch *might* help the aggressor live another day and remain a part of the flock.
I get what you're saying though, and I mostly let nature take it's course as well. Just not where I messed up or if it's something that really bothers me. And that may change as I learn and grow as well. Hopefully I will be better prepared!

