Supplementation of ammonium perchlorate (NH, C1 o,) were added at different levels (25, 50, 100, 200 and 400 mg/kg) to the ration of 3 -weeks old Fayoumi chicks. The treatments were pro longed till 16 weeks of age. Body weights at different ages were studied. Besides, eviscerated weights, dressing percentages, and rper centages of different muscles and organs of males at 12 and 16 weeks of age were taken into consideration.
It was found that ammonium perchlorate supplementation benificially affected the growth of 16 weeks old chicks. It increased the percentages of the edible parts (breast, legs and thighs) in the male carcass at 16 weeks of age. Ammonium perchlorate at 25 mg/kg diet seemed to be the more suitable level of supplementation.