Table 4.
Effects of γ-aminobutyric acid and probiotics on corticosterone serum in broiler breeder

Parameters	Treatments			SEM	P-values
	Control	GABA	Probiotics
Corticosterone (ng/mL)	14.18a	8.02b	8.30b	0.762	0.0001

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