Hmm he was 7 months
Cockerels at that age are generally hormonal jerks. If they don't have a mature, adult roo to keep them in line, it can be rough. They usually calm down.
But if I had one like that, he would be gone. Fast.

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Hmm he was 7 months
A valid point!VOTE FOR SUNLIGHT!!!
You mentioned hen discrimination, but I more often see people discriminating against roosters mainly because they don't lay eggs and they fight. Is Sunlight against this too?