In a Green Bay hearing beginning Tuesday, a controversial attempt to expand a dairy farm set to become the fifth largest in Wisconsin will be challenged in a case that could have a far-reaching impact on how Wisconsin regulates industrial-size livestock farms. Five neighbors of Kinnard Farms Inc. in northeastern Wisconsin are arguing that the state Department of Natural Resources should allow the farm to expand but tighten environmental protection by requiring surface and groundwater monitoring and limiting the number of cows.