It shall be unlawful for any person to keep and maintain within the city any livestock or keep or maintain, in any kind of enclosure whatsoever, any livestock, except on property zoned for agricultural uses or which was previously zoned as agricultural and has been continually and principally used for agricultural uses since it was annexed into the city. Any person owning or occupying real estate within the city which property is properly zoned and used for agricultural purposes, as previously set forth, shall be permitted to maintain properly secured enclosures for livestock if the same is not located within five hundred (500) feet of the nearest dwelling place. This section shall not apply to any person maintaining slaughterhouses and stockyards where livestock are kept only for a short period of time provided, however, that the property on which such slaughterhouse or stockyard is maintained is properly zoned for such use. Violation of this section is declared to be a municipal infraction. The penalty for violation shall be the sum of twenty-five dollars ($25.00) per animal. (Code 1953 § 3.8; Ord. No. G-80-12, § 1, 7-17-80; Ord. No. G-97-44, § 1, 11-20-97)