Dead chicks were removed and weighed daily to calculate mortality and adjusted growth performance data. The lighting program started with 23 h of light from 1 to 7 d, 22 h of light to 14 d, and 20 h of light to 21 d. The temperature from hatching to 7 d was maintained at 32 to 34°C, 29°C to 14 d, and 27°C to 21 d. The BD (Table 1) was formulated to be deficient in Met according to the Ross nutrient specification (Aviagen, 2007).