It shall be unlawful for the owner of a vicious dog to keep it within the city unless it is confined within a secure building or enclosure, or unless it is securely muzzled and under restraint by a competent person who by means of a leash, chain or rope, has such dog firmly under control at all times.
(1989 Code, § 3-31) Penalty, see §§ 3-91 et seq.