Holding: The Federal Meat Inspection Act expressly preempts a California law regulating the treatment of non-ambulatory pigs at federally inspected slaughterhouses.
Plain English Holding: A California law regulating the treatment of livestock that cannot walk (and which requires, for example, that such animals be euthanized immediately and not used for food) is invalid because it is trumped, or “preempted,” by a federal law regulating the treatment of livestock at slaughterhouses.
Judgment: Reversed, 9-0, in an opinion by Justice Kagan on January 23, 2012.
Merits Briefs for the Petitioner
Amicus Briefs in Support of the Petitioner
Merits Briefs for the Respondents
Amicus Briefs in Support of the Respondents