N.H. Rev. Stat. Ann. § 436:9-b

The assistant state veterinarian, under the direction of the commissioner and state veterinarian, shall assist the state veterinarian with the enforcement of this chapter and any other law over which the division has regulatory authority. The state veterinarian may direct the assistant state veterinarian to act for him or her in an official capacity whenever he or she may be absent from his or her duties.