The Board shall, upon written application, on a form furnished by the Board, issue a permit to any person other than a licensed pharmacist who in the usual course of business sells any item referred to in § 54.1-3467 as a wholesale distributor or distributes at retail to any persons who own or breed or raise livestock, poultry, or other animals to which such items, devices or substances are customarily given to or used upon in the interest of health, safety, or good husbandry. This permit shall not authorize the sale or distribution of these items, devices or substances for human use and the permitted person shall exercise reasonable diligence to assure that the items distributed are not for the purpose of human consumption.