Whenever it appears to the Mayor that there are good reasons for believing that any dog within the City is rabid, he may issue a proclamation requiring that all dogs shall, for a period to be defined in the proclamation, wear good, substantial muzzles, securely put on, so as to prevent them from biting or snapping, and any dog at large during the period defined by the Mayor without such muzzle, shall be taken by the Humane Officer and impounded.
(1967 Code §3-23)