The significant improvement of body weight of birds fed
CM diets with enzyme supplements is consistent with
previous findings of Teves et al. (1989), Pluske et al.
(1997) and Sundu et al. (2004). Interestingly, the effect of
enzymes on bird performance was only evidenced when
the birds reached five weeks of age (Fig. 1). During the
first four weeks, the effects of enzymes were not
significantly different. Earlier than that, enzyme addition
did not increase body weight significantly. According to
Thornton et al. (1956), passage rate of feed in young
chicks is faster than in adults. Hence the feed enzymes