Full cages refer to a type of animal housing where multiple animals are kept in a confined space, often for agricultural or research purposes. This setup can lead to overcrowding, which may affect the animals' health and well-being. Full cages are commonly associated with the farming of poultry, pigs, and other livestock. In many regions, the use of full cages has sparked debates about animal welfare. Critics argue that these conditions can lead to stress and behavioral issues among the animals. As a result, some countries have implemented regulations to improve housing standards, promoting more humane alternatives like free-range or enriched cages.