This study investigated the effect of energy level on the growth of grasscutters and also nutrient retention of grasscutters. A total of 36 grasscutters were used for the study. The experimental animals were allowed two weeks of stabilization period and feeding trials lasted for eight weeks. Three diets having energy levels of 2 800 (control), 2 600 and 3 000 kcal/kg, respectively were used for the experiment. The results of the study showed significant differences (P<0.05) among the treatment in average daily weight gain, average daily feed intake, although there was no significant effect (P˂0.05) on the feed conversion ratio. The effect of dietary treatment on feed intake were significantly different (P<0.05) in favour of grasscutters fed 3 000ME. Also, other growth performance parameters – daily weight gain and final body weight were better (P<0.05) and higher for grasscutters fed 3 000 ME. The effect of dietary treatments also had a significant effect on the parameters for nutrient retention, the level of protein retained increased with increase in dietary energy levels, and other nutrients retained were all statistically significant (P˂0.05). The cost of producing feed increased with increase in the energy level, although in terms of the cost of producing 1kg of body weight, it was lesser i.e. more economical in grasscutters fed 3 000ME. 1485524163.php