Having a small flock of yard birds. When you don’t cull the male chicks you wind up with an excess of rosters. The young ones are usually kept away from the hens by the older males that are protecting their own. The younger ones will sometimes jump each other and that usually leads to one heck of a fight and sometimes one or the other doesn’t survive.
Wow. That does sound like homosexual sex. No wonder they call it cockfighting.