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Liquid feed delivery systems for pigs have tended to be more common in areas where liquid by-products (i.e. dairy whey) are readily available and where the size of the production unit can justify the capital expenditure involved. The potential advantages of liquid feeding include: a) reduction of feed loss during handling and feeding; b) improvement in the pig's environment due to the reduction of dust in the atmosphere; c) improved pig performance and feed conversion rate (Jensen and Mikkelsen, 1998; Dell’Orto et al., 1992); d) flexibility in raw material use (opportunity to utilise more economic food source, i.e. silages); e) improved dry matter intake in lactating sows. However, very few studies have been done concerning technical quality of the liquid feed with respect to homogeneity, fluidity and sedimentation (Hoppenbrock et al., 1998)...