City Code Chapter 18 deals with animals in general. Relevant sections: Section 18-24, Keeping of Fowl: 144 sq foot minimum coop size, 50 foot setback from other dwellings, schools, etc. 12 sq foot minimum for each fowl in an outdoor pen. Section 18-23, Fowl Running at Large: You can free range them only on property owned or controlled by you. Section 18-19, Disposition of Manure from Stables: Chickens are "animals" under the definition of this section, which requires daily cleanup and disposal of all manure into a closed container. This would be a good one for an anti-chicken neighbor to cite. Section 78-113, Prohibited Noises Enumerated: Animal and fowl noises. The keeping of any animal, bird or fowl which, by causing frequent or long continued noise, shall disturb the comfort or repose of any person in the vicinity.

They can have roosters. This is something I have been considering doing myself. Our HOA, however, forbids keeping chickens specifically as the city WILL allow chickens. (Don't forget the city expands into people's backyards all the time)