I bought three pullets and three straight run chicks. The straight runs were all boys. By the time they were 3-1/2 months old, two of the boys were unholy terrors. They bit me. They harassed the girls until the girls just sat on the roost in the coop. I had to hand feed and water them; if they were on the floor or the ground, one of those cockerels was on them.
The situation went from everyone pretty much getting along to this situation in a matter of days. I tried to find homes for the two, but in the end I had to cull them. I couldn't even wait another four days to take them somewhere, they had to go NOW, it was that ugly.
If your chickens are all still getting along, figure out which, if any, of the cockerels you want to keep. Get rid of the rest. Rehome if you can, cull them if you can't. I couldn't find any takers. Not even "free chicken dinner, some disassembly required."
Culling them was very difficult. I cried. Hard. It wasn't their fault they were born male. But after the second one was gone, the girls came out of the coop. There was peace in my flock once again. Yes, I still have the third cockerel, and so far it is working out with just three pullets. From what I've read here, I am lucky in that regard.