It is unlawful for any person to allow or permit any dog or other pet to run at large in any park, except dogs used by a public law enforcement officer; provided that, except in areas in which animals are prohibited, dogs or other pets are permitted in a park if on a leash not greater than six feet in length, or otherwise securely caged or securely restrained from running free. (Ord. 4071 § 1, 1989.)