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Published online by Cambridge University Press: 21 November 2017
Pigs at weaning are usually regrouped to form batches of individuals similar in weight, and consequently of a similar potential for growth. This has the effect of disrupting the social organisation present amongst pigs sucking a sow. Re-establishing social order involves fighting and stress, both antagonistic to a high level of performance. The aim of the study was to observe the effect on performance of group size and of mixing pigs at weaning.