(a) As used in this article, the term:

(1) "Classified dog" means any dog that has been classified as either a dangerous dog or vicious dog pursuant to this article.

(2) "Dangerous dog" means any dog that:

(A) Causes a substantial puncture of a person's skin by teeth without causing serious injury; provided, however, that a nip, scratch, or abrasion shall not be sufficient to classify a dog as dangerous under this subparagraph;

(B) Aggressively attacks in a manner that causes a person to reasonably believe that the dog posed an imminent threat of serious injury to such person or another person although no such injury occurs; provided, however, that the acts of barking, growling, or showing of teeth by a dog shall not be sufficient to classify a dog as dangerous under this subparagraph; or

(C) While off the owner's property, kills a pet animal; provided, however, that this subparagraph shall not apply where the death of such pet animal is caused by a dog that is working or training as a hunting dog, herding dog, or predator control dog.

(3) "Local government" means any county or municipality of this state.

(4) "Owner" means any natural person or any legal entity, including, but not limited to, a corporation, partnership, firm, or trust owning, possessing, harboring, keeping, or having custody or control of a dog. In the case of a dog owned by a minor, the term "owner" includes the parents or person in loco parentis with custody of the minor.

(5) "Serious injury" means any physical injury that creates a substantial risk of death; results in death, broken or dislocated bones, lacerations requiring multiple sutures, or disfiguring avulsions; requires plastic surgery or admission to a hospital; or results in protracted impairment of health, including transmission of an infection or contagious disease, or impairment of the function of any bodily organ.

(6) "Vicious dog" means a dog that inflicts serious injury on a person or causes serious injury to a person resulting from reasonable attempts to escape from the dog's attack.

(b) No dog shall be classified as a dangerous dog or vicious dog for actions that occur while the dog is being used by a law enforcement or military officer to carry out the law enforcement or military officer's official duties. No dog shall be classified as a dangerous dog or a vicious dog if the person injured by such dog was a person who, at the time, was committing a trespass, was abusing the dog, or was committing or attempting to commit an offense under Chapter 5 of Title 16.