The experiments of the current study were carried out in the poultry scientific research house in Gardarasha/ Animal resource Dept.- Collage of Agricultural Engineering Sciences, Salahaddin University- Erbil Kurdistan region, Iraq. This study included two experiment, each of seven treatments with three replicates. Two stocking densities were applied in both experiments. The first experiment was for the broiler, 705 days- old chicks commercial Ross 308 were raised in 2m2 in each pen for 35 days, the stocking density as followings; T0 (negative control, standard density) 75 chicks, 25 chicks...