For Iowa farmers wishing to sell hogs into California, Cloverleaf Animal Welfare Systems' Jamee Eggers offered advice and insight into the process at Iowa State University's annual Swine Day last month.

"Is there life or opportunity after Prop 12? I think so, but it's different for each farm," she said July 25.

At issue are new, stringent and arbitrary housing requirements put in place by voters in California on whole-muscle pork, veal and chicken products sold in the state, effective as of Jan. 1 this year.

The rules apply to breeding sows and...