My friend and neighbour kept pigs. She had two black pot bellied pigs. Pigs have to be cleaned out every day, as they smell really badly, they must have shelter as they can get sunburnt as their skin is very like ours. They also have to be kept out of the rain as they can get a chill. They dig up any ground around them as it's their nature to root around in the ground, so you have to be careful where you keep them, they can dig up a small field in a couple of weeks and make it into a bog. They can also live up to 25 years. In short, they are a big liability.