This study was carried out at the Ataturk University Research and Application Farm in city of Turkey. About 180 Lohmann layers with uniform body weight at 50 weeks of age were blocked into cages cm, width x depth x height) as Top Middle (M) and Bottom (B) tiers in cages Facing Window (FW) and Corridor side (C). Each treatment was replicated in 6 cages m each tier level of the each cage location each cage containing 5 ha. Experiment lasted for 2 months. The experimental diets were formulated as isolocaloric and isonitrogenous to meet NRC recommendations (NRC, 1994).