While the GMP standard might be compulsory in the US (see for an introduction a text from Nebraska University) it is not in the EU. Good Manufacturing Practices are part of a quality management system covering amongst others the manufacture and testing of food. They have been adopted in many countries world-wide. A GMP standard focuses on production processes. It requires that the process is documented, all production and testing tools and equipment used have been qualified as suited for use, and all methodologies and procedures in use have been validated according to specifications. GMP codes have been developed for feeding, farming, transport, medication, processing (related to equipment and additives), information exchange and record keeping (see also www.pdv.nl). Specific GMP codes have been developed for animal production, including Salmonella control, compound and medicated feed, and undesirable substances (Luning and Marcelis, 2007).