It shall be unlawful for the owner, or any other person having the possession, care, custody or control thereof, to permit any dog to run at large upon the public streets, walks, parks, or other public places within the city, unless such dog shall be attached to a leash of sufficient strength to restrain such dog in such manner as to be kept under the control of the person accompanying it.
(`73 Code, 35.197, § 9.67)  Penalty, see § 10.99