Nutrient analysis: The dry matter, nitrogen, crude
protein, phosphorus and fat contents were determined
as described by AOAC (2002). The Gross Energy (GE) of
the diets and excreta samples were determined using
an adiabatic bomb calorimeter (University of Kwazulu-
Natal Laboratory, South Africa). The Apparent
Metabolizable Energy (AME) content of the diets was
calculated (AOAC 2002)