Introduction
Pelleting and crumbling copra meal (CM) increased body weight and gizzard size of birds (Sundu et al.,2005). A possible reason for the positive effect of crumbling is increased feed intake (Callet, 1965; Choi et al., 1986) possibly due to increased bulk density of the crumbled CM based diets to 0.67 g/cm3 compared to 0.53 g/cm3 for the unpelleted CM based diets (Sundu et al., 2005). The greater development of the gizzard could have been due to the increased total feed intake and increased bulk density. The inclusion of enzymes in a 300 g kg-1 CM diet has been found to increase the body weights of birds kept for 45 days so that they were not significantly different from the weight of birds fed a corn/soy control diet (Sundu et al., 2005). Gizzard size of the birds fed 300 g kg-1 CM with
enzymes was decreased by 28 %. This may indicate that enzymes worked well, particularly in the gizzard of birds fed CM base diets. The following experiment was designed to test the ideal ratio between fine and coarse crumbled CM and the interaction of enzymes with the different proportion of crumbled CM on broiler growth and gastrointestinal development.