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 zoning permit first"
I'm in zone RF, so this may change depending on your zone. If you need to find out information specific to you, you can find their contact information here: https://www.warrentownshipmi.com/ in the Township Officials section.
Hope this helps someone!
"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 zoning permit first"
I'm in zone RF, so this may change depending on your zone. If you need to find out information specific to you, you can find their contact information here: https://www.warrentownshipmi.com/ in the Township Officials section.
Hope this helps someone!