A proposed farm bill would mandate lifelong confinement of pigs in gestation crates, tiny metal enclosures that prevent animals from turning around. Animal welfare advocates warn this would institutionalize extreme confinement practices that have already been banned in several states and rejected by major food companies. The legislation would override existing state laws protecting farm animals.

Gestation crates have been a flashpoint in animal welfare debates for years. These cages, typically measuring about 2 feet by 7 feet, are used to house pregnant sows. Industry groups defend them as necessary for worker safety and preventing piglet deaths, while critics argue they cause severe physical and psychological suffering. Major retailers including McDonald's and Walmart have pledged to eliminate crates from their supply chains.

The bill's provisions would create a federal standard that prevents states from implementing stricter animal welfare regulations. This preemption language has alarmed animal advocates who see it as a rollback of progress made through state-level reforms. The legislation comes as public opinion increasingly favors more humane farming practices.