Show blackhead carriers blackhead Dlack head la Is generally carried into turkeys by very small worms which have been depos deposited lied on the soil by ch chickens lekens since these worms live over in the soil from one year to the next the best means of preventing the disease in turkeys la Is to ta have them run on clean ground that has not been contaminated tamina ted in any way by either chickens or turkeys in the previous two years A system of aroun ground d rotation la Is the best to ilse use in accomplishing this ibis end |