Body weights are presented in Figure 1a, b, and c for early middle and late eperimental ages, respectively. A significant increase in BW was observed in birds reared under GL as early as 3 d of age as compared to all other treatment groups (Figure 1a). This trend continued through 5 and 7 d of age, compared to birds reared under RL or WL. At these ages, no significant difference in BW was found between birds treated with GL and BL. By 9 d of age, GL chicks were heavier than all other groups including the BL birds (Figure 1b). From 11 to 14 d of age, chicks reared under GL were significantly
heavier then birds reared under RL or WL. The weight of chicks reared under BL was not significantly different from that of all treated groups. From 20 d of age until
termination of the experiment (Figure 1c), broilers reared under GL or BL were significantly heavier than birds reared under RL or WL.