(a) «Dangerous
dog» means any
dog which (i) without justification attacks a person,
companion animal
as defined in subdivision five of section three hundred fifty of this chapter, farm animal
as defined in subdivision four of section three hundred fifty of this chapter or domestic animal
as defined in subdivision seven of this section and causes physical injury or death, or (ii) behaves in a manner which a reasonable person would believe poses a serious and unjustified imminent threat of serious physical injury or death to one or more persons,
companion animals, farm animals or domestic animals or (iii) without justification attacks a service
dog, guide
dog or
hearing dog and causes physical injury or death.