Table 4.

The effect of PROE supplementation on the carcass traits percentages relative to the live body weight.

Item	PROE0	PROE1	PROE2	PROE3	SEM	P-value
Intestine	5.14	6.36	6.05	6.49	0.171	0.335
Spleen	0.09	0.08	0.09	0.09	0.009	0.881
Bursa	0.09b	0.14a,b	0.17a	0.18a	0.022	0.026
Thymus	0.33b	0.41a,b	0.48a	0.53a	0.035	0.018
Gizzard	2.47a,b	2.97a	2.79a,b	2.35b	0.081	0.074
Liver	2.02	2.10	2.21	1.92	0.077	0.708
Carcass	64.81	63.46	63.63	64.02	0.425	0.725
Heart	0.41	0.44	0.39	0.39	0.023	0.841

Means within the same row carrying different superscripts are significantly different at (P < 0.05).

PROE0, basal diet without additives; PROE1, basal diet + phenolic rich onion extract (1 g/kg diet); PROE2, basal diet + phenolic rich onion extract (2 g/kg diet); PROE3, basal diet + phenolic rich onion extract (3 g/kg diet).