The movement of Canadian feeder pigs into the United States is a long-standing feature of an increasingly integrated North American hog industry. This trade began scaling up in the 1990s as Canada expanded farrowing capacity and the United States built out large, efficient finishing and packing operations. Under USMCA, live swine are tariff free and phytosanitary protocols are synchronized, allowing producers on both sides of the border to specialize. Canadian producers concentrated more heavily on farrowing and early-stage pig production, while U.S. operations invested in...