Table 2.

The effect of enrichment treatment on average daily feed intake (ADFI), BW and feed conversion ratio (FCR) in weaner and finisher pigs. Data are presented as LS means with SEM. Weaner pigs received standard (S) or enriched (E) treatments. Finisher pigs were kept either in the same enrichment treatment (SS and EE treatments) or were switched from enriched to standard (ES) and vice versa (SE) enrichment treatments.

	Housing during weaner stage				Housing during finisher stage
Parameter	S	E	SEM	P-value	SS	EE	ES	SE	SEM	P-value2
ADFI (kg/animal)	0.85a	0.82b	0.01	0.04	2.71a	2.62b	2.75a	2.60b	0.04	0.04
BW (kg)	33.7	33.4	0.36	0.49	117a	119b	121b	116a	0.60	0.0001
FCR1 (Total feed intake, kg/BW gain, kg)	1.50a (1.47–1.53)	1.44b (1.41–1.48)		0.03	2.39a (2.33–2.45)	2.30b (2.24–2.36)	2.30b (2.24–2.37)	2.43a (2.34–2.52)		0.0009

^a-bValues within a row with different superscripts differ significantly at P < 0.05, but they apply only to comparisons within weaner and within finisher stages.

¹Data were analysed after transformation by natural logarithms and are presented as back-transformed means with confidence intervals.

²Finisher P-value represents either effect of the enrichment treatment during finisher stage (ADFI) or the effect of enrichment treatment during weaner stage (BW, FCR). There were no other significant differences or trends caused by enrichment treatment during weaner/finisher stage or their interaction.