It is unlawful for any person to keep any pig or pigs within the City limits; provided, that it shall not be unlawful for a duly licensed stockyard engaged in the business of feeding and/or marketing pigs in transit or in commerce to keep and maintain the same for a time not longer than reasonably necessary to feed and rest them when in transit or to receive, sell and make delivery thereof in the ordinary course of marketing operations, nor for any duly licensed packinghouse to keep such pigs as may be necessary for its immediate day to day slaughtering operations.
(1979 Code § 8.24.040)