Found the code for you.
Henderson Code of Ordinances
Sec. 6-5. Animal, fowl and bees nuisance.
No person shall be a custodian of, or permit, an animal, fowl or bees nuisance.
For purposes of this section any one of the following shall constitute an "animal, fowl or bees nuisance:"
(a) The keeping of an animal which molests persons, animals or passing vehicles;
(b) The keeping of an animal or fowl which trespasses on or damages private or public property (including the leaving of waste materials);
(c) The keeping of an animal or fowl which emits sound in an excessive, continuous or untimely fashion; or
(d) The keeping of an animal, fowl or bees which creates any condition which might endanger the public health, safety, welfare or environment or interferes with the quiet and peaceful enjoyment of the property of others.
(Ord. No. 45-85, 12-30-85; Ord. No. 11-86, 4-22-86)
Considering 25 chickens on a city lot, and that people was able to smell the chickens from the road. Sounds like she had too many to take clean up after.