The experiment was conducted to investigate the effects of Ether Extract of Propolis (EEP) on Ross (308) broiler performance
and carcass characteristics. This experiment was carried out in a completely randomized design with 5 treatments (different
levels of propolis including 0, 100, 250, 500 and 750 mg/kg diet) for 6 weeks. The mean weight gain, feed consumption and
feed conversion ratio were recorded weekly. In addition At 42 days old the total body weight, total body weight gain, carcass
and some internal organs relative weights were recorded. The results clarified that, the weight gain was significantly reduced
in the 4th and 6th week (P<0.05), while the feed consumption, feed efficiency were non significantly (P>0.05) reduced for
propolis fed birds in comparison to those fed control diet, Furthermore, inclusion of 100, 250, 500 and 750 mg/kg diet
Propolis significantly reduced body weight at 42 days old and total body weight gain in comparison to control diet (P < 0.05).
Under the condition of this experiment, prolonged use of propolis had adverse effect on performance of broilers. Also, all
doses of propolis had non-significant negative effect on liver, heart, gizzard and carcass relative weight. In conclusion, EEP
has no beneficial effect on performance and Carcass characteristics of Broilers.