I am making the following guesses: these are the first chickens that you have, as in there are not older and younger birds in the flock. And that as they grew up, the space stayed the same, (I see you do plan to address the space issue, but have not at this point) and while it does not say where you live, I am assuming that the nights are getting longer.
Add to that the roosters are coming into their own, and while this is the only tension you see, I would bet there is a lot of tension in the flock.
What I would suggest if you are determined to keep that many roosters, put all the roosters in one pen for the winter. Let the girls grow up in a little peace. Then in 4-5 months you can make a better decision which roosters to which hens you want to breed. And more than likely, which roosters you should cull. Now that can mean to dispatch them, or it can mean to just live out their lives in the bachelor coop, or to give away. You decide.
However, I do not see your current plan of one or two roos with a small group of hens working. Roosters really don't get sharing that well, and often times will fight between the fence. In my opinion, to have that many roosters, one should have about 70 +/- hens, and acres to roam on.
As for the victim, sometimes they are always the victim, and given any stress, the attacks will break back out. Sometimes they do come into their own, and usually are merciless to any new birds.
Mrs K
ps - when I re-read your post, the numbers don't add up? At the beginning, you have 20 birds, but in a post lower down, you have 40?
Add to that the roosters are coming into their own, and while this is the only tension you see, I would bet there is a lot of tension in the flock.
What I would suggest if you are determined to keep that many roosters, put all the roosters in one pen for the winter. Let the girls grow up in a little peace. Then in 4-5 months you can make a better decision which roosters to which hens you want to breed. And more than likely, which roosters you should cull. Now that can mean to dispatch them, or it can mean to just live out their lives in the bachelor coop, or to give away. You decide.
However, I do not see your current plan of one or two roos with a small group of hens working. Roosters really don't get sharing that well, and often times will fight between the fence. In my opinion, to have that many roosters, one should have about 70 +/- hens, and acres to roam on.
As for the victim, sometimes they are always the victim, and given any stress, the attacks will break back out. Sometimes they do come into their own, and usually are merciless to any new birds.
Mrs K
ps - when I re-read your post, the numbers don't add up? At the beginning, you have 20 birds, but in a post lower down, you have 40?