Table 3. Effects of environmental enrichment on uniformity in weanling pigs

Item	Control	EE-1	EE-2	EE-4	SEM	p-value
Phase 1 (d 14)
CV	12.43^a	11.77^ab	10.86^b	10.45^b	0.53	0.006
Phase 2 (d 28)
CV	13.49^a	12.41^ab	11.37^bc	10.50^c	0.58	< 0.001
Overall (d 28)
CV	13.49^a	12.41^ab	11.37^bc	10.50^c	0.58	< 0.001

Means with different superscripts in the same row differ significantly (p < 0.05).
EE-1, inclusion of play object until one week after weaning; EE-2, inclusion of play object until two weeks after weaning; EE-4, inclusion of play object until four weeks after weaning; CV, coefficient of variation.