An anesthesia mask configured to be worn on an animal's head. The mask includes a contoured surface that substantially follows the contours of a portion of the animal's head and defines a cavity that at least partially receives the head. One or more outlets in communication with the nose and/or the mouth are formed in the contoured surface. The mask includes a first opening configured to receive anesthesia and at least one channel that conducts the anesthesia from the first opening to the outlet(s). The mask may include an airflow collection system that includes inlet(s) formed in the contoured surface, a second opening connectable to a vacuum device, and passageway(s) configured to conduct an unused portion of the anesthesia from the inlet(s) to the second opening. The mask may include a body portion and a removable bite bar component that include first and second portions, respectively, of the contoured surface.
