Table 6.

Effect of treating dietary red grape pomace with polyethylene glycol and a cellulolytic enzyme mixture on internal organs and carcass characteristics (g/100 g HCW, unless otherwise stated) of broiler chickens.

2 Parameters	1 Diets					3 SEM	p Value
	CON	dGP	dPEG	ENZ	PENZ
Slaughter body weight (g)	1653.2 b	1468.4 a	1604.4 a,b	1523.0 a,b	1564.9 a,b	35.53	0.009
HCW (g)	1276.5 c	1120.6 a	1243.6 b,c	1177.9 a,b	1181.4 a,b	18.38	0.0001
CCW (g)	1227.4 c	1075.8 a	1210.0 b,c	1133.2 a	1141.1 a,b	18.53	0.0001
Dressing percentage	77.2	76.5	77.7	77.7	75.6	1.499	0.840
Liver	2.31	2.22	2.22	2.28	2.23	0.043	0.565
Gizzard	2.30	2.47	2.34	2.33	2.45	0.072	0.381
Heart	0.64	0.69	0.69	0.74	0.69	0.022	0.070
Proventriculus	0.51	0.54	0.55	0.55	0.54	0.017	0.540
Spleen	0.11	0.16	0.12	0.13	0.12	0.013	0.265
Pancreas	0.26	0.25	0.26	0.28	0.24	0.014	0.304
Duodenum	0.66 a	0.84 b	0.83 b	0.82 b	0.80 b	0.027	0.0003
Ileum	1.36 a	1.54 a,b	1.66 b	1.48 a,b	1.53 a,b	0.050	0.004
Jejunum	1.38 a	1.61 b	1.72 b	1.59 b	1.68 b	0.045	0.0001
Large intestine	0.71	0.37	0.38	0.22	0.39	0.112	0.057
Ceaca	0.82a	1.14 b	1.40 c	1.04 a,b	1.23 b,c	0.056	0.0001
Lungs	0.65	0.65	0.68	0.73	0.67	0.031	0.380

¹ Diets: CON = commercial chicken diet without red grape pomace; dGP = commercial chicken diet containing 100 g/kg untreated red grape pomace; dPEG = commercial chicken diet containing 100 g/kg red grape pomace pre-treated with polyethylene glycol (50 g/kg); ENZ = commercial chicken diet containing 100 g/kg red grape pomace pre-treated with Viscozyme^®-L (1 g/kg); PENZ = commercial chicken diet containing 100 g/kg red grape pomace pre-treated with polyethylene glycol (50 g/kg) and Viscozyme^®-L (1 g/kg). ² Parameters: HCW = hot carcass weight; CCW = water cold carcass weight; ³ SEM: Standard error of the mean; ^a,b,c In a row, dietary treatment means with common superscripts do not differ (p > 0.05). ^a,b,c In a row, dietary treatment means with common superscripts do not differ (p > 0.05).