Humans have already driven countless animals to extinction in North America. I believe chickens fill an empty ecological niche given how easily they adapt to local ecosystems and the manner in which they improve the environment
If you've never experienced free chickens improving your own land...
I've been warned countless times about the noise guineafowl make. Screaming at things in groups is their normal response to stress. In your situation I would probably focus on quail and maybe turkeys