Table 4.
Effects of GABA and probiotics on the level of serum corticosterone in Hy-Line parent stock

Parameters	Treatments			SEM	P-values
	Control	GABA	Probiotics
Corticosterone (ng/mL)	13.86a	5.27b	5.77b	0.566	<.0001

Means in same rows with different superscripts are significantly different (P<0.05).