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This study aims to determine the use of protein and energy from the Black soldier fly (BSF) maggot with age differences in chickens. The research was conducted in the Animal Husbandry Department, Faculty of Agriculture, University of North Sumatra. Completely Randomized Design (CRD) with 4 treatments and 5 replications was used in this study. The treatments were BSF maggots aged 14, 21, 28, and 35 days. The parameters consisted of crude protein digestibility, nitrogen retention, and Apparent Metabolizable Energy (AME). The results showed that the treatment was statistically significant (P &lt;0.01) on protein digestibility, nitrogen retention, and AME in chicks. Increasing the age of the BSF maggot decreases protein digestibility, but this shows an increase in AME. It was concluded that the BSF maggot was the most efficient according to the utilization of protein and energy at the age of 24 days.

Efficiency utilization of protein and energy of maggot black soldier fly at different phase on chicks