Table 2.
Effect of GABA and the probiotic on egg quality in Hy-Line parent stock

Parameters	Treatments			SEM	P-values
	Control	GABA	Probiotics
Egg weight (g)	58.42	54.71	57.05	1.084	0.067
Ablumen height (mm)	7.51	7.44	7.51	0.371	0.988
Haugh units	87.00	87.60	87.18	2.163	0.980
Yolk color	7.52	6.90	7.16	0.232	0.183
Shell thickness (μm)	4.05	4.42	4.72	0.284	0.265
Shell strength (g/cm2)	404.00	419.00	415.00	7.348	0.342