I have a small rooster flock, it has been almost 2.5 years now. I had removed nicely laced pure breed birds to people who wanted to breed them and added newly grew up ones.
Currently I have 4 roosters/cockerels in the flock, they live together peacefully.
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- In regards to the aggression:
It helps to have a good head rooster. The current top rooster will step in to stop a fight before it gets physical. I will punish any birds for showing human aggression by locking the aggressive bird in a rooster jail:
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Any unruly cockerel/rooster that challenges my authority goes into one of these for solitary confinement until he reforms, he is allowed to watch other roosters free ranging while reflecting on his own mistakes. There are food and water, but the bird is not allow to go back to the main coop at night while being punished.
The trick is to make sure your cockerel/rooster knows what he is punished for.
I find this method works, although some cockerels forget faster than the others, so for some birds, you might have to repeat the process.
- Estimated run and coop size
Well, the bigger the better, but at least 1 square meters per bird inside the coop. I highly recommend free ranging them during the day. Larger space tends to minimise birds fighting.
I also have a large cage inside the coop for the young cockerel introduction period and just in case there is a really bad fight and I have to separate the flock. Although I never had to use it for the latter purpose.
Also, always provide some places where a defeated bird could hide, I think this is essential to prevent a bird from getting badly injured.
- Can these all-male flocks truly work?
Yes ... well, most of the times anyways if you are patient and put in the effort the right way.
Bear in mind, there will be fights and there will be blood.
At least for me, there has never been a permanent injury or death due to scuffle amongst my birds in the rooster flock.