If you performed a Keyword search, as I suggested, "chicken" would have immediately led you to "fowl".
Fowl means
chickens, guineas, geese, ducks, pigeons, and other avian animals. (Section 3-10)
From that, you would know that any fowl must be restrained on ones property, as any other property owner can impound them at will if found on their own property (3-14). You would also find that they are in imminent danger of being declared "Nuisance" by an opposed neighbor, as the nuisance animal definition is quite broad. (3-15)
Sec. 3-15. - Nuisance animals; animals posing a threat to the public.
(a)[Definitions.](1)For the purposes of this section, "nuisance" means, but is not limited to, the conduct or behavior resulting from any act of omission or commission by the owner or keeper of any small or large animal, fowl, cat or dog which molests passersby or passing vehicles, damages private or public property; barks, whines, howls, crows, growls or makes other noises in an habitual or continuous fashion which annoys the comfort, repose, health or safety of the people in the community; is unconfined in season; defecates on the property of someone other than the owner; or eats or otherwise destroys the plants, shrubs or similar landscaping on the property of someone other than the owner.
(2)For the purposes of this section, "nuisance animal" means any animal that commits any of the acts, conduct or behaviors defined as constituting a nuisance in this section.
(b)[Keeping of nuisance animal prohibited.] No person shall keep any animal which is a nuisance animal or which causes a nuisance as defined in this section.
3-70 Refers you to another document about how to keep chickens, and further, lets you know that the laws regarding chicken keeping were amended in 2013.
It shall be unlawful to keep, house or pen
chickens or rabbits on premises which fail to meet sanitary standards established by the Cumberland County Board of Health.
(Ord. of 6-17-2013(1))
3-75 tells you that there is a limit of 10 chickens on any property in any city (municipality) to which this code applies.
(c) No more than ten
chickens or rabbits shall be kept, housed, or penned at a dwelling or on the lot on which such dwelling is located within the corporate limits of any municipality in which this chapter is applied.
and finally, the thing we didn't want to see -
APPENDIX A - ZONING[1]
Footnotes:
--- (1) ---
Editor's note— At the county's instruction the zoning ordinance is not set out herein but is on file and available for inspection in the office of the planning department of the county.
From here, you need to find out your specific property zoning at the planning department, then further investigate permitted and conditional uses.
...and I've not had my first cup of coffee yet. Good luck
@Ducklingguy