Table 2.

Effect of feeding system on animal behaviour (% of observation time), social and aggressive interactions (n/cow).

Item	Posture	Housing	Grazing	SEM 1	p
Outdoors	Lying, %	34.2	10.5	1.93	<0.0001
	Standing, %	32.6	53.5	3.74	<0.0001
Indoors	Lying, %	5.52	15.9	2.06	0.0006
	Standing, %	27.6	20.1	2.29	0.1074
Grazing (GR), %		--	46.8
Eating indoors (EI), %		31.9	16.0
Eating (GR + EI), %		31.9	62.8	2.28	<0.0001
Drinking, %		1.92	0.46	0.145	0.0304
Ruminating, %		29.2	26.6	2.13	0.4996
Walking, %		5.58	2.15	0.492	0.0052
Idling, %		30.4	8.37	1.70	<0.0001
Affiliative interactions, n		1.43	3.18	0.344	0.0007
Aggressive interactions, n		0.25	0.56	0.121	0.1186
Self-grooming, n		2.98	1.75	0.322	0.0096

¹ SEM = standard error of mean.