You won't know until you try, but have a contengency plan just in case.
Many cocks will get a bit hormonal nutz early in the season, yours may be one of them. By what I have been told they settle down in a couple of weeks as their body adjusts.
There are exceptions to every rule and here is one. These two brothers have not been separated since they hatched. they have a harem of eight hens and do not fight (yet) I have had sons and daughters, yearlings, in a breeding pens without problems too. It really depends on the birds, they...