I reached out to the Warren Twp (Township in Michigan, not Warren City) Zoning Administrator asking about Chickens in the township and received the following confirmation:
"You have to have 5 Acers to have farm animals so yes you can have chickens, if you plan on building anything you must get a...
I'm moving to the Coleman area in Michigan soon and I'm wondering if anyone keeps chickens around there. I have 20 acres, so space isn't really an issue and it's not right in town. Just don't want to set everything up and get in trouble.. The land is zoned RF (residential farming).