The effects of Sulfaquinoxaline (SQO) when used over a prolonged period for anticoccidial prophylaxis or as growth promotant on the hepatorenal performance were investigated.To determine the effect on the withdrawal period various tissue levels of SQO were also measured.A total of 180 (one day old) chicks were administered a prophylactic dose of SQO (1 g/L in drinking water) for 31 days.They were ...