highly significantP < 0.01
A highly significant difference ( P < 0.01) was observed in the EPEF among different groups; birds fed finisher diets CTL21 recorded the highest EPEF (329.87%) which was statistically equal to birds fed test diet APS21 and CTL20 diet (305.86% and 303.48%, respectively) but was different from birds fed APS20, APS19, CTL19, CTL18, and APS18 with EPEF values as 296.04%, 288.50%, 266.91%, 231.62%, and 230.14%, respectively.