The increase in the level of canola meal in the broiler diet significantly (P < 0.05) affected the apparent nutrient digestibility coefficient (Table 3) of DM, CP, and
NFE. The nutrient digestibility of DM decreased linearly. The quadratic response of the nutrient digestibility of CP increased up to the 20% level and decreased thereafter. The nutrient digestibility of NFE decreased with the inclusion of canola meal