Table 2.

Effect of dietary treatments on the body weight and the relative weight¹ of liver, spleen, bursa of Fabricius of ducks.

Variables	Group	Day 14		Day 28		Day 42
		Mean	SEM	Mean	SEM	Mean	SEM
Body weight (g)	C	313.60	15.75	1160.40	66.21	2393.00 a	80.23
	MO	307.60	23.18	1184.80	38.40	2102.75 b	42.53
	MSC	268.40	23.99	1090.40	40.53	2262.00 ab	52.54
	MS	355.20	32.61	1216.00	29.83	2152.50 ab	52.42
Significance		NS		NS		p < 0.05
Liver relative weight (%)	C	4.55	0.42	2.73	0.20	2.72	0.06
	MO	4.15	0.07	2.79	0.15	2.34	0.09
	MSC	4.55	0.32	2.54	0.11	2.54	0.09
	MS	4.12	0.22	2.74	0.11	2.67	0.16
Significance		NS		NS		NS
Spleen relative weight (%)	C	0.09	0.01	0.10 a	0.01	0.06	0.01
	MO	0.10	0.02	0.07 ab	0.01	0.07	0.01
	MSC	0.09	0.02	0.06 b	0.01	0.07	0.01
	MS	0.11	0.00	0.08 ab	0.01	0.07	0.01
Significance		NS		p < 0.05		NS
Bursa of Fabricius relative weight (%)	C	0.18	0.03	0.13 ab	0.01	0.11	0.01
	MO	0.19	0.02	0.14 a	0.01	0.11	0.01
	MSC	0.19	0.04	0.11 ab	0.01	0.12	0.01
	MS	0.22	0.03	0.09 b	0.01	0.11	0.01
Significance		NS		p < 0.05		NS

C: control, MO: milk thistle oil, MSC: milk thistle seed cake, MS: milk thistle seed; NS: non-significant (p > 0.05). ¹ Weight of organs in relation to body weight; ^ab Means in the same column with different superscripts are significantly different (p < 0.05).