Some farmers prefer indoor farming because they believe it allows them to provide the best care for their pigs, regardless of climate or land-type.
It also allows farmers to carefully manage their impact on the environment. Internationally, indoor pig farming is the norm.
Indoor farming units are designed to be kept warm and dry, provide a high level of monitoring and enable staff to interact safely with their animals. In indoor systems, sows and grower piglets are predominately housed in social groups.