Improved performance in commercial broiler flocks with subclinical infectious bursal disease when fed diets containing increased concentrations of vitamin E

Abstract

The economic effects of increased vitamin E supplementation in 79 commercial broiler flocks incorporating over 1.5 million birds was assessed. Approximately half of the flocks were fed on either a high (178 IU/kg) or normal (48 IU/kg) vitamin E-containing diet. In addition, in approximately half of the flocks subclinical infectious bursal disease (IBD) was present. © 1993, Taylor & Francis Group, LLC. All rights reserved.