Found their city codes.
Sec. 5311 Livestock not to run at large.
The running at large of any horse, mule, donkey, cow, hog, sheep, goat or cattle of any kind, in or upon any street, avenue, alley or any public place, or upon the property of another where the same have no right to be, is hereby declared to be a nuisance, and it shall be unlawful for the owner or person in charge of any such animal to suffer or permit the same to so run at large.
Sec. 5314 Enclosures required for certain animals.
No person shall keep any cattle, horses, mules, burros, swine, sheep or goats within the corporate limits of the City in any place except within a substantial enclosure; provided, however, that this section shall not be applicable to any such animal while being worked or while being driven to and from pasture or market, or while it is under the immediate personal control of some person, or when substantially picketed.
Within this section, "substantial enclosure" means a barn, corral or an area of land enclosed by a fence of sufficient strength and so constructed as reasonably to prevent any such animal within such barn, corral or area of land from breaking or forcing its way out of or through the same or escaping therefrom.
I dont know if this happened in town or what, but I wonder if they were even allowed to keep a pig.