Huh? They have the reputation for being slovenly because they wallow in mud. However, pigs lack sweat glands. They roll around in the mud to stay cool in hot weather. Caking mud on their bodies also prevents sunburn and deters insect infestation. Without mud, pigs could get second-degree burns all over their body.
But why do pig seem to smell so much? A bare pig is odor-free; the odor comes from their living style. If pigs have enough room, they keep their toilet area far away from where they live and muck about. Even newborn piglets will leave the nest to go to the toilet within hours of birth. .
Source: almanac. Com