Wendy's, Applebee's, IHOP and mega-grocer Wal-Mart are shifting to eggs produced by cage-free chickens after the Humane Society released a video showing egg-farm workers abusing chickens and dead birds littering cages. The well-funded campaign is HSUS' latest salvo in a battle over the treatment of animals in the production of America's food supply. But the agricultural industry, including farmers around the country, is fighting back. That's according to a story by P.J. Huffstutter in today's Los Angeles Times.