Location of chicken house: Avoid locations close to other existing chicken farms. Be attentive of wind directions for the building construction, to minimize the risk of air-born infection.
All-in-all-out: To reduce the multiplication of disease-causing agents inside the chicken house, all stock of chicken must be sold at one time, without keeping any remain chicken.
Disposal of wastes: Remove all wastes immediately, dispose properly and disinfect.
Site security: Minimize possible entry of infectious agent through moving between houses and flocks, equipment and other objects.