Chapter 4.03.003 of the Code of Ordinances: Dogs Running at Large
It shall be unlawful for any person owning or harboring a dog to permit such animal to run at large.A Dog Running at Large is defined as:
Any dog not confined by premises or owner by substantial fence of sufficient strength and height to prevent the animal from escaping there from, or secured on the premises by a metal chain or leash sufficient in strength to prevent the animal from escaping from premises and so arranged that the animal will remain upon the premises of the owner when the leash is stretched to full length. Also see tethering restrictions in Sec. 4.03.007 Tethering prohibited.
Any animal within an automobile or other vehicle of its owner or owner's agent shall not be deemed to be running "at large." Any animal restrained by a leash or lead under physical control of a person shall not be deemed to be running at large.