In recent years, administration of these antimicrobial additives as growth promoters in poultry diets has been banned because of the concerns about Propolis is known to have considerable antimicrobial, antiinflammatory, and immunomodulatory effects (Bankova et al., 2000; Burdock, 1998; Dobrowolski et al., 1991). It is also has been shown that propolis could be a successful
additive in poultry production. Khojasteh Shalmany and Shivazad (2006) reported that the inclusion of propolis in broiler chickens diets improved the growth performance. Galal et al. (2008) showed that dietary supplementation of propolis improved both performance and the
immune response of laying hens. Ziaran et al. (2005) also reported that diet supplementation with propolis modulated both the humoral and cellular immunity of broiler chickens.