Intensive and extensive poultry production imposes certain stresses, which have a potentially adverse effect on optimal productivity. Obviously it is in the interest of any poultry producer to reduce the stress levels on his birds thus increasing productivity. Silent 4 is a safe anti-stress, adaptogenic and anti-oxidant preparation of herbal extracts, which is free from side effects. Silent 4 enables producers to reduce the adverse effects of this in-built inappropriate response to stress in poultry. Silent 4 assists the adaptability of the body against stress by maintaining the functions of the adrenal glands and it helps maintain normal resistance.