For the purposes of §§ 40-34-13 to 40-34-15, inclusive, a vicious dog is:
(1) 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
(2) Any dog which, on private property, when unprovoked, in a vicious or terrifying manner approaches in apparent attitude of attack, or bites, or inflicts injury, or otherwise 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 of a course of dealing with the owner of such private property.