  This experiment was conducted to study the effect of administration
{\gamma}-amino butyric acid (GABA) on physiology performance of broiler chicks.
The following treatments were used: T1:control treatment, T2: the birds were
administration 0.2ml 0.4% GABA solution daily, T3: the birds were
administration 0.2ml 0.5% GABA solution daily and T4: the birds were
administration 0.2ml 0.6% GABA solution daily. The results of the experiment
indicated that there were significant differences for the calculating blood
lipids .When calculating blood enzymes, there are significant differences
between the treatments
