Some of my dogs would probably at least scare them sometimes, but there are the neighbor's dogs too. I'd rather not risk it. Plus, my parents don't want them free ranging again - they want them far from the house.
My dogs chased a chicken once. ONCE.
After me screaming at them they haven't done it again. I've also trained them to basically act like there's nothing there when a chicken is around. "Leave it" is my favorite command.
My coops are usually nice and clean and I rotate the chickens so the grass is always there.

