The systems of rearing / keeping animals are the intensive and the extensive systems.
Animal rearing involves a variety of systems designed to meet particular requirements. The intensive system—which is frequently used in industrial farming for pigs and poultry—involves high-density confinement with careful human management, optimizing production efficiency. On the other hand, the vast system promotes a more natural environment by allowing animals to roam freely over larger areas.
This type of system is typical for grazing animals such as cattle and requires little human intervention. With the extensive system emphasizing sustainability and a balance with nature, and the intensive system placing a higher priority on efficiency, each system has unique benefits and considerations.