◆ Vietnam
◇ Place : Cargill Breeder Farm
◇ Period : 80 days, From 24/03/2002 to 11/06/2002, Age of flock is from 26weeks to 37weeks
◇ Total heads : Control : 8,942 hens, Treatment : 9,108 hens
◇ Treatment : This group was given 3 kgs of soluble OGC-ZS per day drinking water