INTRODUCTION
Poultry plays an important role in the economic development of the country.
Bangladesh provides a very fertile and virgin field for the development of broiler
industries. Broiler production has become a profitable and most popular income
generating activity at present time for the people of the country. The broiler industry
in Bangladesh is developing rapidly and its success depends on how rapidly a bird
attains maximum marketable weight. The principle of poultry production is to
achieve high level of performance through efficient utilization of feed keeping
survivability as maximum as possible. The ultimate consumers of the end products of
poultry are human beings and the major concern of all industries is the well being of
the mankind. People of modern times are very much conscious about their health and
quality of food items that they will consume. The term feed additive is applied in a
broad sense, to all products other than those commonly called feedstuffs, which could
be added to the ration with the purpose of obtaining some special effects (Feltwell
and Fox, 1979).