I have two roosters that have been harassing my hens lately. I want to make them into some soup.
Killing all the chickens sounds like it’s going a bit to far. Maybe he’s just trying to threaten you into not asking again? I say DONT kill Mr. Problem Roo by yourself, because parents don’t seem to like it when you take a knife to your family pets. I’m sorry that your dad doesn’t want to solve the issue. For now I’d filedown his claws and spurs and if that doesn’t help, confront your dad again later. If he doesn’t want to kill that one rooster, I don’t think he’ll kill all the chickens.