So glad I came upon this thread. A rooster does help but he too will generally run and hide if he can... at least that's what mine does. I've had problems with Coopers hawks and Turkey vultures this year. My chicks are usually kept in a hoop house style pen that offers aerial cover but I do like to let them free range from time to time. Has anyone who uses open pastures had any luck with companion animals to help guard against aerial attack? I was thinking maybe a heard dog could be trained to help this way. Plausible?