"Serious injury" means an injury having a reasonable potential to cause death or any injury other than a sprain or strain, including serious disfigurement, serious impairment of health, or serious impairment of bodily function and requiring significant medical attention.
"Vicious dog" means a canine or canine crossbreed that has (i) killed a person, (ii) inflicted serious injury to a person, or (iii) continued to exhibit the behavior that resulted in a previous finding by a court or, on or before July 1, 2006, by an animal control officer as authorized by ordinance that it is a dangerous dog, provided that its owner has been given notice of that finding.
Va. Code § 3.2-6540.1