I killed an aggressive cockerel this morning, it is not an easy thing to face. It was quick but it took me a while to regain composure. I had hatched him and his sisters in the incubator 8 months ago and raised them with TLC. He began attacking me about 3 months ago, and tho I repeatedly tried behavior modifying tactics like holding him down, making him move out of my space, etc, he persisted in these attacks. Usually it didn't hurt, I'm bundled up, he's small, but lately, spurs would go thru my clothing and draw blood. It got so that I didn't have a relationship with my pullets anymore. I couldn't go into the run without watching my back. I have a separate adult flock with a rooster (who is polite) so I really didn't need a spare, and certainly not one who doesn't behave. I am so relieved not to have to deal with the little hot shot, and I like to think the pullets are too.