You can bet that if all the animals in America had televisions -- as they do in San Francisco's SPCA shelter -- they'd be tuned in to California's election returns on Nov. 4. A free-range chicken. On the ballot is an initiative -- Proposition 2 -- that is as potentially transformational for the treatment of farm animals raised for food in the United States as the presidential vote could be for the nation itself. Watching closely will be the nation's big meat and egg producers. Because if Californians embrace Prop. 2 -- and scant polling on the initiative suggests it's …