Pork producers are keeping up their campaign for a legislative fix to California's Proposition 12, the statewide voter-approved measure that sets minimum space requirements for breeding pigs whose products are sold in California.

The proposition, passed by California voters in 2018, requires that pork sold in the state come from operations that meet specific sow housing standards. Producers and their representatives have argued since its passage that compliance costs fall heavily on farmers far outside California, because the state imports the vast majority of its pork, while the standards were set without a federally recognized framework.

The push for a fix has continued in Congress, where lawmakers from major hog-producing states have repeatedly advanced legislation and appropriations language aimed at limiting the reach of state animal-welfare laws across state lines. Previous efforts have been attached to federal spending bills, though none has yet been signed into law.

Producer groups contend that retrofitting barns to meet the housing requirements carries per-sow costs that strain farm margins, particularly when hog prices and feed costs already weigh on profitability. They also argue that the law creates a patchwork of state standards that complicates interstate commerce for packers and processors.

Supporters of Proposition 12 maintain that the measure reflects consumer demand in California and that producers who choose to sell into the state's market can adapt their operations accordingly.

The U.S. Supreme Court upheld the law in May 2023, ruling that the proposition did not violate the dormant Commerce Clause. That decision shifted the producers' strategy toward Congress and federal rulemaking, and industry groups say they intend to keep the issue on lawmakers' agenda as long as the compliance burden remains in place.

With the pressure campaign unresolved, hog operations supplying the California market face continued uncertainty over how, or whether, a federal fix will materialize.