Yeah, by then it almost too late.
All the humans in residence need to deal with(dominate) the birds, not so in much of an active way, but by posture and attitude.
A secure run is better than a nasty cockerel.
Should have a secure run anyway.....
....cock/erels are often only a speed bump n the way to the predator buffet.
Probably best to get rid of him.
FYI.....semantics, maybe, but can be important communication terms when discussing chicken behavior.
Female chickens are called pullets until one year of age, then they are called hens.
Male chickens are called cockerels until one year of age, then they are called cocks(or cockbirds or roosters).
Age in weeks or months is always a good thing to note.