This is so that the hogs do not become stressed and it also helps to maintain the safety and health of the herd. The hog houses are temperature controlled so that the herd does not become to hot or to cold. When bad weather hits the farm, there isn't much to prepare for. Since the hogs are already indoors, they are pretty safe from outdoor conditions. Most farms have generators to prevent a loss of power from causing any threat to animal health or safety.
Food is very important in raising hogs.
They are fed a special diet of corn-soybean meal. This is a vitamin-mineral based meal that fulfills their nutrient requirements. Some factors determined in how the mixture is made for hogs are their age and the stage of production that they are in. How a hog is fed greatly affects production and efficiency on the farm. Farmers use several pieces of special equipment during the production process to help them.