505.15  KEEPING OF VICIOUS DOG.
   No person shall own, keep or harbor any dog, known by him to be vicious, dangerous or in the habit of biting or attacking persons, whether or not such dog wears a tab or muzzle, and upon satisfactory proof that such dog is vicious, dangerous or in the habit of biting or attacking persons, the Chief of Police or any other police officer may cause such dog to be killed.
(1975 Code Sec. 4-17)