This aggressiveness in the Bachelor pad could have been caused by the Mothers of the birds.Buckeyes for meat:
Agree with the others, it will take longer and they will not have as much breast meat as Cornish, but I felt they had more than many heritage breeds.
Buckeyes for sex link:
Buckeyes have the Red gene, so when you cross a Buckeye Cockerel with a silver gene hen, all the males will be white and all the females reddish.
We crossed Buckeye Roo over Delaware hens, and by luck of the hatch got all boys, all white.
They were the meanest grow-out pen I have ever had. They actively tried to kill every other bird in the pen. They were on 32% protein feed and had pleanty of alfalfa/clover pasture to keep them busy. I had to isolate them. They had to go to the butcher early because the mean look in their eyes started to be directed at the kids. I hope you have better luck with your sex-link project.
Cocks get their attitude from their Mothers.
If you breed a meanish hen she will have mean sons.
I have had this told to me several times.
The hen determines her son's attitude.
The Cock determines the egg color & feather color in his daughters, Mother to son, Father to daughter.
I have raised multitudes of Buckeye Cockerels & add them at various ages to a Bachelor pad coop & awaite their growth, to determine which I want to keep.
Never have they fought............seldom even a pecking order peck.
Just sayin'