The following words, when used in this Chapter, shall have the meanings set out herein:
DOGS OR CATS
All animals of the canine or feline species, both male and female.
OWNER OR KEEPER
Any person having a right of property in a dog or cat, or who keeps or harbors a dog or cat, or who has it in his/her care or acts as its custodian, or who knowingly permits a dog or cat to remain on or about any premises owned or occupied by him/her.
RUNNING AT LARGE
Allowing a dog or cat to be off the private premises of the owner or keeper or his/her agent or servant and not on a leash or confined to the arms, motor vehicle, trailer or other conveyance of the owner or keeper, his/her agent or servant.
SERIOUS PHYSICAL INJURY
Physical injury that creates a substantial risk of death or that causes serious disfigurement or protracted loss or impairment of the function of any part of the body.
TRESPASSER
A person upon the premises of the owner or keeper of the dog in question without license or privilege to be upon said premises.
UNRESTRAINED DOG
Any dog running at large or a dog on the premises of its owner or keeper but not confined to said premises by a leash, fence, structure or other means that would prevent the dog from leaving such premises.
VICIOUS DOG
Any of the following dogs:
1. 
Any dog, whether or not running at large and whether or not unrestrained, that without provocation has bitten any person not a trespasser causing serious physical injury to that person.
2. 
Any unrestrained dog, whether or not running at large, that without provocation has attempted to bite any person not a trespasser which would cause serious physical injury to that person.
3. 
Any unrestrained dog, whether or not running at large, that without provocation has placed any person not a trespasser in apprehension of immediate serious physical injury.
4. 
Any dog that has killed another dog, cat or other domestic animal without provocation.