It’s probably connected with decreased fat in liver [16]. Breast meat bone ratio of broilers fed 0.15% DL-methionine or 0.15% herbal methionine was higher by 35.7% and 59.0%, respectively, versus control. Similarly, [17] reported that percentage of breast yield was more when DL-methionine and herbal methionine was added in the diet. Relative weight of abdominal fat of broilers fed 0.15% and 0.20% herbal methionine was decreased by 32.4% and 29.1%, respectively, compared to control. This is agreement with the results of [18] who showed that herbal methionine significantly decreased abdominal fat.