The dry sow is well suited to utilise high fibre diets and there are some suggestions that feeding such diets in pregnancy may enhance litter size and subsequent piglet performance. This experiment was designed to investigate the effects on performance of inclusion of a high level of fermentable fibre in the form of unmolassed sugar beet pulp (SBP) in the diet of dry sows.

24 gilts and 20 multiparous Landrace x Large White sows were allocated to one of two diets according to weaning or entry date, parity and liveweight. The diets comprised a barley/soya basal diet with either 450 g/kg wheat (diet W) or SBP substituting for this wheat to provide the same quantity of corrected digestible energy (diet B). The two diets were fed at differential levels, to supply the same daily total of corrected digestible energy, from weaning or gilt entry until farrowing. The allocated amount of diet was given in a single daily feeding period to animals confined in individual feeding stalls, and a period of one hour was allowed for the ration to be consumed. After farrowing all animals were fed twice daily on a standard diet, according to a scale related to litter size.