They weren't sued because there was carcinogens in the chicken, but they were sued because of California's Proposition 65, which stated that if there's anything dangerous in the products then the companies had to give a clear warning.
Não foram processados devido à existência de carcinogéneos no frango, mas sim devido à Lei nº 65 da Califórnia, que estabelecia que, havendo algo de perigoso nos produtos, as empresas tinham que colocar um aviso claro.