The proximate compositions (protein, lipid, dietary fibre, ash and moisture contents) of the experimental diets were determined according to the standard method (AOAC, 2000). The crude protein was analyzed by the Kjeldahl method with a conversion factor of 6.25 to convert total nitrogen into crude protein. Crude lipid was extracted by Soxhlet extractor with petroleum ether (Siddique and Aktar, 2011; Siddique et al., 2012). After ensuring complete extraction, petroleum ether was evaporated and the residue was dried to a constant weight at 105° C. Fibre was quantified on 2 g samples previously boiled with diluted H2SO4 (0.3 N).