An uncastrated male may become aggressive and his sharp teeth can be dangerous to his owner. A castrated male's teeth will grow more slowly and his teeth may only need to be trimmed once a year, while a female probably won't need hers cut at all. A proper diet is important not only to keep the pig's skin healthy, but also to keep its weight under control. There are commercial diets available for miniature pigs. These pets should not be fed from the table as this practice can lead to obesity and other associated diseases from the lack of a balanced diet.
Pigs are smart animals and can be housebroken.
However, they are not very trainable. What they will do is root with their nose and chew on things. They have been known to root up areas of carpeting or yards. Like cats and dogs, pigs also need to be spayed or neutered. Castration is major surgery.