Historically, backyard farming provided the sole source of chicken meat and eggs in Bangladesh. Chickens were reared to meet family demands and productivity levels were low. The modernization of The poultry sector started around 1960 with the import of modern breeds, equipment and marketing Systems. From that point onwards, the Bangladeshi poultry sector gradually shifted towards a Commercial industry. Before 2000, commercial broiler and layer farms were dependent on imported Parent Stock (PS).