Page 22 of articles about feed
Sodium butyrate supplementation in lactating sows and nursery pigs
Re-examination of the CVMP opinion for veterinary medicinal products containing zinc oxide
EU: Methods of sampling and analysis for the official control of feed

Effects of feed processing and diet composition on the nutritional value
Pelleting and extrusion can potentially increase energy and nutrient digestibility of swine diets and their effects are affected by the diet composition.