see Roswell on a map
 Layman's version:
No hens will be allowed at single-family homes on one-third acre or less. Homeowners with one-third to one acre can keep six birds. Homeowners with more than one acre can have 12 birds per acre, up to a maximum of 36. Chickens can also be kept at schools.
The ordinance doesn’t apply to property of two acres or more that’s zoned agricultural or land that’s been annexed from Fulton County, most of which is farmland. And chicken enclosures must be set back at least 50 feet from neighboring property lines.
 The Urban Chicken ordinance on the books:
The law was just passed on December, 14, 2009 and the exact text of the ordinance is not yet available. (the layman's version above is from the
AJC news story