ABSTRACT: This study was carried out at the Research Poultry Farm, Faculty of Agriculture, Sohagced with ALWADI Company without any betaine supplementation and served as control group. While, birds in the 2nd, 3rd, 4th and 5th groups were fed the same diet with supplemented betaine at different levels of 100, 150, 200 and 250% i.e. 2, 3, 4 and 5kg ... إقراء المزيد