3-401.   Definitions.
The following words and phrases shall have the meanings respectively ascribed to them as follows:
   A.   Owner: The term owner shall mean any person, firm, or corporation, keeping, possessing, harboring, or having the care or custody of a dog subject to the provisions of this chapter.
   B.   Attack: An unprovoked attack in an aggressive, terrorizing, or threatening manner on a human in which the victim suffered a physical injury, including but not limited to a scratch, abrasion, or bruise; or on a domesticated animal that causes death or injury that requires veterinary treatment.
   C.   Potentially Dangerous Dog: A potentially dangerous dog is:
   1.   Any dog as defined herein, which, when unprovoked causes minor injury to any person. Minor injury means an injury in which the victim suffers pain as a result of an attack by the dog but which does not produce any broken bone, bleeding, or death on the part of the victim.
   2.   Any unrestrained dog, which, when unprovoked, bites, injures, or kills another domestic pet or livestock.
   3.   Any dog which is declared to be a potentially dangerous under the procedures set forth in this chapter.
   D.   Dangerous Dog: A dangerous dog is:
   1.   Any dog, which when unprovoked commits a severe injury to any person. Severe injury means any injury in which the victim suffers pain as a result of an attack by the dog and which includes any broken bone, bleeding, or death on the part of the victim.
   2.   Any dog which maims or kills domestic pets or livestock when not under restraint.
   3.   Any dog which is used in the commission of a crime as provided by Tennessee Code Annotated including but not limited to dog fighting, threatening or menacing, or guarding the conduct of unlawful activity.
   4.   Any dog which is declared to be a dangerous dog under the procedures set forth in this chapter.