Pigs use mud to avoid sunburn. « Some people have gone so far, especially with show pigs, as to slather sun screen onto their pigs when they know that they wil

Pigs use mud to avoid sunburn. « Some people have gone so far, especially with show pigs, as to slather sun screen onto their pigs when they know that they will be out in the sun for a considerable time and they don't want them to get dirty with mud. » -- http://petcaretips.net/pigs-sunburn.html http://petcaretips.net/pigs-sunburn.html You could also just keep your pet pig indoors all the time.