From cage-free chicks to puppy mills and Avian flu: Republicans are trying to roll back animal protections in the U.S.

The Republican-led Ending Agricultural Trade Suppression, or Eats, Act aims to end the authority of states and localities to set animal welfare and food safety standards. If passed, it could also jeopardize more than 1,000 state and local health and safety laws that set food-quality requirements and stop the spread of invasive...