Digestibility trial was conducted at the end of the 8th week. Two birds per replicate were transferred to metabolic cages and allowed three days adjustment period. Faecal droppings were collected and weighed, oven dried and re-weighed for four days. The faecal collection per replicate were bulked, milled and analysed for proximate constituents along with the experimental diets using standard methods of Association of Official Analytical Chemist (AOAC, 2002). Nutrients digestibility was calculated as follows: