Cattle are among the oldest farm animals due to their wide range of uses. Pigs are, in economic terms, one of the most important livestock species in many regions of the world. Farmers have developed a variety of breeds
as well as very different approaches and husbandry systems under greatly varying conditions. In addition to securing food supplies, these animal breeders and keepers increasingly work towards meeting other social
demands worldwide, such as the conservation of biological diversity and man-made landscape, animal welfare and climate change mitigation.