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 larg
