The average egg production values were 84.61 87.93 and 84.19 0 0 for tiers T, MandB at location FW; 83.71, 78.28 and 85.39% for those at location C, respectively. In agreement with this experiment, Vovensy (1990) reported great variability among the groups caged at different tier levels facing windows and located at colTidore. Hens at location FW had higher egg production than hens at locations C.