Extensive pig production systems, e.g., free-range production
or other forms of enriched production, have gained
increasing interest in Europe and North America
Beside a few traditional pig production systems, e.g.,
Iberian pig production in La Dehesa a change from confinement to enriched
systems including aspects of free-range will be a challenge
in a pig production, which is being constantly modernised,
as pointed out in several papers