The Missouri Supreme Court has ruled that a state law prohibiting counties from imposing regulations on industrial hog operations does not violate the Missouri Constitution. The ruling upholds a lower court decision that county ordinances seeking to establish rules for concentrated animal feeding operations (CAFOs) are invalid. In 2021, the Missouri General Assembly passed legislation prohibiting local ordinances that are “inconsistent with, in addition to, different from, or more stringent” than state law. Twenty counties had enacted restrictions on animal feeding operations before the state prohibited local regulation.