Mintz v. Baldwin

Background

A group of Wisconsin cattle dealers raised, sold, and shipped dairy and breeding cattle to New York. New York’s livestock official issued an order that imported cattle over six months must come from herds certified free of Bang’s disease and be accompanied by authenticated herd certificates. The plaintiffs shipped 20 cattle with certificates showing the animals tested clean but without proof that the source herd was certified. New York refused delivery, the sellers removed the animals, and the sellers sued seeking an injunction, arguing the state rule conflicted with federal animal disease laws.

Reasoning

The Court examined whether federal statutes prevent New York from enforcing its inspection rule. The opinion explained the 1905 Act applies only to shipments from districts the federal government quarantines, which did not apply here. The 1903 Act gives federal inspection certificates force of law only when a federal inspector has actually examined and certified animals; it does not itself bar state measures in other situations. The Agriculture Department had written that it issued no quarantine and preferred leaving control to the States. The record showed Bang’s disease is widespread, can lower milk yield, can cause human undulant fever via raw milk, and that blood tests may miss early infections. On these facts the Court found the state order a reasonable, good-faith inspection measure and not an undue burden on interstate commerce, and it affirmed dismissal of the sellers’ suit.

Real world impact

The ruling allows New York to require herd-level certification against Bang’s disease and to block uncertified dairy or breeding cattle from entering. It supports state authority to protect herd health and milk consumers, while leaving federal inspection and certification effective where it actually occurs. The order covered most dairy and breeding imports but excluded immediate-slaughter cattle and certain beef types, and similar state restrictions may continue elsewhere.