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Livestock breeds (and breeding systems) developed for intensive production systems often do not perform as expected in organic and extensive systems. For these alternative systems animals need good social and ranging behaviour, which is in general not necessary in intensive systems with greater confinement for the animals. Although this is the case in all the livestock species (e.g. dairy cows, pigs and sheep), in poultry, the differences between organic/free range and conventional systems are comparatively large. This research focusses on adaptation of laying hens to the (new) free range syst... Mehr ...