§ 93.021 VICIOUS DOG DEFINED.
   For the purpose of this chapter, a VICIOUS DOG is:
   (A)   Any dog, which, when unprovoked, in a vicious or terrorizing manner approaches in apparent attitude of attack, or bites, inflicts injury, assaults or otherwise attacks a human being upon the streets, sidewalks or any public grounds or places; or
   (B)   Any dog which, on private property, when unprovoked, in a vicious or terrifying manner approaches in apparent attitude of attack, or bite, or inflicts injury, or other wise attacks a mailman, meter reader, serviceman, journeyman, delivery man or other employed person who is on private property by reason of permission of the owner or occupant of such property or who is on private property by reason a course of dealing with the owner of such private property.
(SDCL § 40-34-14)
   (C)   Every vicious dog and every dog which has the habit of barking or howling in the night, or one that habitually chases and barks at vehicles disturbing and annoying any person or neighborhood, or one that shall injure or destroy any lawn, garden, shrubbery, flowers or vines, is hereby declared to be a public nuisance, and no person shall keep or harbor any such dog.