Table 3.

Effect of different levels of pennyroyal, savory, thyme essential oils and antibiotic on weight of organs in 35- d aged quail chicks (expressed as % of live body weight).

Treatments∗	Liver	Heart	Carcass (skinless)	Breast	Tights	Gastrointestinal tract∗∗
Control	2.25	0.80	59.39	29.97	20.75	8.28
Antibiotic	2.00	0.85	61.44	29.71	20.89	8.73
P200	2.59	0.85	62.86	30.28	22.55	7.65
P300	2.49	0.95	59.74	29.66	20.90	7.78
P400	2.80	0.88	60.68	29.52	21.12	8.95
S200	2.55	0.88	63.11	30.49	20.87	7.76
S300	2.56	0.75	58.99	29.12	20.88	8.43
S400	2.19	0.87	60.59	29.65	20.89	8.30
T200	2.07	0.84	62.02	30.74	21.10	7.39
T300	2.41	0.84	59.03	29.24	20.75	8.88
T400	2.56	0.82	58.66	27.81	20.30	8.00
P-Value	0.72	0.13	0.60	0.54	0.70	0.78
SEM	0.29	0.03	1.74	0.83	0.65	0.66

^∗Antibiotic is 100 ppm Flavophospholipol. P200, P300, P400 indicate the levels of 200, 300 and 400 ppm of Mentha pulegium essential oil. S200, S300, S400 indicate the levels of 200, 300 and 400 ppm of Satureja hortensis essential oil. T200, T300, T400 indicate the levels of 200, 300 and 400 ppm of Thymus vulgaris essential oil.

^∗∗Gastrointestinal tract includes the total weight of the crop, gizzard and intestines.