Table 2.

Effect of porcine bile acids on laying performance of laying hens¹.

Item	Control	Bile acids, mg/kg			SEM	P-value
		30	60	90		ANOVA	Linear	Quadratic
Daily egg production, %	80.72c	83.29b	85.59a	82.16bc	0.51	<0.01	0.20	0.02
Average egg weight, g	61.87a	60.65b	60.61b	60.46b	0.19	0.01	<0.01	0.02
Daily egg mass, g/d per bird	49.45b	50.51ab	51.88a	49.73b	0.32	0.02	0.66	0.03
ADFI, g/d per bird	110.27	110.11	109.41	108.26	0.38	0.22	0.82	0.13
FCR, g/g	2.23a	2.16ab	2.15b	2.17ab	0.01	0.05	0.08	0.03

SEM = the standard error of the mean; ADFI = average daily feed intake; FCR = feed conversion ratio.

^{a, b, c} Means within a row with no common superscripts differ significantly (P < 0.05).

¹Data represent the mean value of 6 replicates each treatment (n = 6).