A study with the aim to evaluate the effects of different dietary energy concentration (8.23, 9.77 and 11.32 MJ ME/kg DM) on scrotal, testicular and semen characteristics of young Dorper rams was conducted during the breeding season. Thirty-six 11-12 month old Dorper rams were randomly allocated to three groups of 12 rams each and fed at different energy concentrations for 127 days. Semen was collected fortnightly from every ram to evaluate semen characteristics. At the end of the trial period, six rams from each group were slaughtered and the carcass, scrotal and testicular characteristics evaluated. Results indicate that although higher energy concentrations accelerate testicular development and resulted in scrotal fat deposition, these induced changes had no significant effect on semen quality and quantity.