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Published online by Cambridge University Press: 20 November 2017
Cereals have traditionally been used in the pig industry as the main source of energy in pig diets. However, as a result of cereal availability and price, alternative sources of energy have been considered, for example the addition of oil to cereal by-product-based diets. By-product-based diets commonly contain higher levels of fibre than cereal-based diets and several studies (e.g. Bakker et al 1995) have reported them to be less digestible in terms of dry matter (DM), energy, crude protein (CP) and oil. The lower DM digestibility of by-product-based diets may lead to a higher level of slurry output, which is an increasing environmental concern. The aim of this work was to examine the differences in digestibility between by-product-based diets supplemented with oil and cereal-based diets.