A sow in the the farrowing room at the UC Davis Swine Center sits up in her pen with her baby pigs around on Friday, Dec. 13, 2019, in California. (Xavier Mascareñas/The Sacramento Bee/TNS) TNS Congress is looking to roll back state animal welfare laws as it wrangles over reauthorization of the federal farm bill. The farm bill, which Congress generally reworks every five years, includes money and federal rules for food assistance programs, farm subsidies, and other ag-related programs.