Table 4.

Stress parameters and welfare traits of commercial broiler chicks among different treatment groups.

Treatment		Tonic Immobility Latency to Right (s)	Isolation Test Vocalization (#/3min)	Feather Score	Gait Score
Lighting hours during incubation	0 h	138.33	53.33	1.67	1.67
	4 h	130.67	55.33	1.67	1.33
	8 h	151.00	54.67	1.67	1.00
	12 h	145.00	54.33	1.67	1.33
	16 h	152.00	54.33	1.33	1.67
	20 h	137.00	50.00	2.00	1.67
	24 h	130.00	62.33	1.67	1.00
SEM		4.39	1.28	0.16	0.15
p-value		0.7890	0.3114	0.9846	0.7874