A bitter three-year legal battle between a Todd County hog farm and neighbors forced out of their homes by foul smells has become a flash point in the larger fight over Minnesota’s expanding pork business and the power of rural residents to protect their tranquil way of life. The struggle has spilled over into the state Legislature, where pork producers are trying to limit so-called nuisance suits brought by feedlot neighbors.Together they illustrate how dramatically rural life in Minnesota has changed as farms grow bigger and more mechanized. Opponents to the proposed law point out that such lawsuits are exceedingly rare in Minnesota — there have been only a handful in the past 15 years — and say banning them would deprive rural residents of one of their last remaining protections against large livestock operations. Moreover, they say, it’s an attack on a centuries-old property right that protects citizens’ ability to use and enjoy their homes, one that could quickly extend to conflicts beyond feedlots. Leaders in the Minnesota pork industry say it’s not the neighbors they fear as much as the attorney who represents them: Charlie Speer, a Missouri-based lawyer, who has built a career on winning tens of millions of dollars for clients in similar lawsuits across the country. And by his side is an attorney for the Humane Society of the United States, which has been involved in similar lawsuits across the country.In short, said FitzSimmons, the future of Minnesota’s hog industry could hinge on the Gourley brothers’ case. “That’s what’s changed — the players,” he said. “This is an attack on animal agriculture. You can’t stand down.”