Ohio State does not have a factsheet. But I do know that the City of Cleveland went through this a few years ago and they do allow farm animals. They have specifics with regards to chickens and pigs. I think is more than a set "space" You can give them as much space as possible and still run into trouble. It is more about proper animal husbandry.

The New Hampshire factsheet (If it is this one, is good)
https://extension.unh.edu/resources/files/Resource000471_Rep493.pdf

Here is a factsheet on the Zoning Ordinances you can search for for CLE
http://planning.city.cleveland.oh.us/zoning/pdf/AgricultureOpenSpaceSummary.pdf

You can talk to Jacqueline Kowalski in the Summit office for more details (she used to be our educator in Cuyahoga County). Her email is: <personal data hidden>

Here are another resources I found that might be helpful.
http://www.urbanaglaw.org/animals-and-livestock

Hope this helps..let me know if you need additional information:

David Marrison
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