الفهرس 
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Abstract
A total of 250, one day old Hubbard broilers’ chicks were randomly allocated into 5 equal groups: control group, low dose (0.1%) garlic (LG) group, high dose (1%) garlic (HG) group, low dose (0.5%) clove (LC) group and high dose (1%) clove (HC) group. For 6 weeks. Results revealed that dietary garlic and clove (natural feed additives contains ghrelin hormone) increased significantly (p<0.05) live body weight, weight gain, feed effeciency, and consequently improved feed conversion ratio. In addition, ghrelin containing additives modulate the behavioral patterns in way that improved their performance. These modulations were represented in significantly increased feeding, immobile and comfort behavior and significantly decreased foraging and agonistic behaviors. Furthermore, dietery garlic and clove proved their ability to stimulate secretion of both endogenous ghrelin and growth-hormones levels in a significant increase (p<0.05) in blood of broilers. Dietary garlic and clove decreased significantly (p<0.05) blood cholesterol, while increased significantly blood total proteins concentrations in chicks when compared to control.