Arizona Revised Statutes Title 13. Criminal Code § 13-1208. Assault;  vicious animals;  classification;  exception;  definition

A. A person who intentionally or knowingly causes any dog to bite and inflict serious physical injury on a human being or otherwise cause serious physical injury to a human being is guilty of a class 3 felony, unless the person would be justified in using physical force or deadly physical force in self-defense or defense of a third person pursuant to chapter 4 of this title.  1

B. A person who owns a dog that the owner knows or has reason to know has a history of biting or a propensity to cause injury or to otherwise endanger the safety of human beings without provocation or that has been found to be a vicious animal by a court of competent jurisdiction and that bites, inflicts physical injury on or attacks a human being while at large is guilty of a class 5 felony.

C. A person who owns or who is responsible for the care of a dog that the owner or responsible person knows or has reason to know has a history of biting or a propensity to cause injury or to otherwise endanger the safety of human beings without provocation or that has been found to be a vicious animal by a court of competent jurisdiction and who does not take reasonable care to prohibit the dog from escaping to the outside of a residence or enclosed area, yard or structure is guilty of a class 1 misdemeanor.

D. This section does not apply to dogs that are owned or used by a law enforcement agency and that are used in the performance of police work.

E. For the purposes of this section, “reasonable care” means the degree of care that a person of ordinary prudence would exercise in the same or similar circumstances.