The powers in this chapter conferred upon the division of animal industries (and unless otherwise apparent from the context, the word "division" hereinafter used refers to the division of animal industries) shall be exercised by the director of the department of agriculture or the administrator of the division of animal industries and such officers, employees and deputies as the administrator, with the approval of the director, may authorize, with the exception of those powers and duties pertaining to sheep, which powers and duties shall be exercised in said department by the board.