My BO rooster Buffy used to love me. He used to follow me, come when called, stuff like that. And the night one of our chickens got killed by one of our dogs, he was suddenly skittish. He runs away from me whenever I came near him and stuff like that. Maybe ha got freaked out or something at the sound of that chicken being killed. But now, six months later, he is still skittish. He only comes when I have a pitcher full of scratch. How do I make him like me again?