if he's attacking your dad, he will end up eventually attacking all of you at some point. this is a bad rooster, and will have to go. I had a rooster that I really liked. He started attacking me. then he started attacking my mom. he eventually even attacked my dad. he also turned into dinner. I was very attached to him and hated to see him go, but he needed to. you need to say goodbye to your rooster. either eat him, or give him away. sometimes mailmen like to take roosters if you need one taken away.