It sued six large poultry companies for alleged pollution in the Illinois River Watershed. Unable to regulate Arkansas farmers directly, the Oklahoma Attorney General sued the poultry companies instead, using the lawsuit to pressure them into imposing the controls Oklahoma could not impose itself. Large poultry companies like Tyson rarely raise their own chickens — they outsource that to small farming operations called “contract growers.” Growers typically operate on year-to-year contracts with these large chicken companies, growing company chickens on razor-thin margins. Until 2055, the special master could search documents and land, take soil samples, cut contracts and refer noncompliant farmers for prosecution.