The garlic was purchased from the local market and the powdered was prepared by mincing and drying using sun light. The experimental diets were designed as diet 1, 2 and 3. Diet 1 served as control (with no garlic powder supplementation) while diet 2 and 3 contained 3% and 5% of garlic powder, respectively (Table 1: A&B). The determined and chemical analysis of the experimental diets and their calculated analysis are shown in table (2). Feed and water were provided ad libitum for 42 days. Continuous light was supplemented throughout the experimental period. Traits Studied: Growth performance parameters were recorded weekly, traits include: feed intake, live body weight, weight gain and feed conversion ratio. At the end of the experiment, birds were weighed and slaughtered and their lymphatic organs (spleen, bursa and thymus) weights were determined. The weight of some major body cuts were weighed such as the legs weight, (both drum stick and thigh), breast weight and fleshed breast weight. Blood samples were collected from three birds of each treatment on 42th day. The birds were bled directly from the heart using sterile disposable syringe. Two ml of blood were collected from each sample. The blood was discharged immediately into collection tube with anticoagulant for examination of the haematological parameters Hb, PCV, Red Blood cell count, and total white blood cell count and the differential count of white blood cell.