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Published online by Cambridge University Press: 23 November 2017
Pregnant sows are commonly fed a restricted diet in order to minimise fat deposition and maximise efficiency of feed utilisation. This restrictive regime can contribute to increased levels of aggression, and also to the development of stereotypic behaviours (Meunier-Salaün et al., 2001). The objective of this study was to assess the effects of providing access to grass silage on the welfare of sows introduced to a large dynamic group.