There are common animal behavior conceptions that do not work for cockerels:
- Todays behavior is not indicator for tomorrow with cockerels.
- being raised together will make for life long friends
- they will happily share chickens or take half of the flock
- being friendly to people will not lead to aggression to people
- cockerels will love their hens and take care of them
They are in the darling stage, a lot of personality, probably acting friendly and playful. This stage does not last. It often leads almost instantly into the nightmare stage. They don't call it cock fighting for nothing.
You need to have a plan B. A 5 ft fish net, to separate fighting birds, and a dog crate. You need them on hand and easily reached. A fight may be a skirmish, and settled, or it may get very ugly. Inexperienced people often times vastly underestimate the violence of an aggressive rooster, let alone a pair of them.
With 4 hens,
I would not have ANY roosters. In about 4 weeks they will make your pullets' lives miserable, with constant mating. It will be very aggressive, and unrelenting. You will not even have 4 hens for months. I do not advise adding a cockerel or rooster to a flock until the pullets are laying. You are a long ways from this and cockerels won't wait.
Roosters have ruined the whole chicken experience for a lot of people. If you have children under the age of 5, I would not keep roosters. They most generally attack children first. Under the age of 6, it can be in the face.
This forum is filled with post where the darling became the nightmare, in an instant. That probably is not quite true, but inexperienced people often times misinterpret the aggression cues as being friendly, or make excuses for the behavior, like wrong color, or startled him. And they vastly underestimate the violence.
Most people who get chickens are animal lovers, and that can make them very uncomfortable with the idea of dispatching a bird. If you don't think you could cull an aggressive rooster, do re-nome him, them ASAP.
In my 20+ years of experience, I would not keep 2 roosters unless I had over 25 hens. If I decided to keep two roosters with that, I would have a good rooster, and raise up a several cockerels under him a year or two later, culling until I got something to work.
Sometimes flock mates will work, but the odds are against you.
Mrs K