Effect of Some Feed Additives on Economic and Productive Efficiency of Broilers

This work was conducted to study the effect of addition of some feed additives on productive efficiency parameters (growth performance, carcass traits and some immune response measurements) and economic efficiency parameters (costs, returns, net profit anA total number of 180 unsexed one day old chicks of Hubbard breed and 180 unsexed one day old chicks of Cobb breed were used in this experiment. The chicks of each breed were randomly allotted into 6 equal groups (30 bird/group), then each group divided iThe broiler chicks of group 1 in both breeds were fed on the basal diet without supplementation (control group). Broiler chicks of group 2 in both breeds were fed on basal diet supplemented with probiotic Primalac (1g/kg diet). Broiler chicks of group 3 i