In this Dec. 2, 2021, photo a hog walks in a pasture on a farm near Elliott, Iowa. Hog farmers that already comply with a California animal welfare law approved by voters in 2018 stand to benefit when the regulations are implemented. But it's unclear if that will ever happen. The law should have taken effect in January, but the state has yet to fully write and approve the necessary regulations, and a state judge delayed enforcement because of that. Then the U.S. Supreme Court agreed to hear a case brought by a national pork industry group that opposes the regulations. (AP Photo/Charlie Neibergall, File)