75 ppm vitamin E (E-75); E-75 plus 8 ppm ALA (E-75-ALA); 150 ppm vitamin C and 50 ppm vitamin
E (E-50) plus 8 ppm ALA (E-50-ALA); and 150 ppm vitamin
C and 25 ppm vitamin E (E-25) plus 8 ppm ALA (E-25ALA). Birds were monitored for mortality two times a day throughout the experiment.