Ala. Code § 2-15-40

Every person engaged in the business of buying livestock as defined in Section 2-15-20 for resale or slaughter or who engages in the business of transporting, hauling or driving livestock as defined in Section 2-15-20 along any public road or highway of Alabama for resale, market or slaughter or who engages in the business of slaughtering such livestock shall be deemed to be a dealer for the purposes of this article.