In fact, pigs are some of the cleanest animals around, refusing to excrete anywhere near their living or eating areas when given a choice. Pigs are misunderstood in many ways. Pigs are smarter than any other domestic animal. Their ability to solve problems, like the pig I.Q. test on THE JOY OF PIGS, is well-documented, and they are considered by animal experts to be more trainable than dogs or cats. Pigs are difficult to classify.
Pigs exist in every part of the world.
To pig farmers, the animal is a commodity. To truffle harvesters, pigs are reliable hunters whose keen sense of smell locates these pricey fungi. To scientists, pigs are unique as one of the only large mammals that exists, in one form or another, in every part of the world. Red River Hogs in West Africa, bearded pigs in Borneo, pig-like peccaries in Bolivia, and outlandishly tusked Indonesian babirusa all enjoy similar lifestyles of food, water, and a good roll in the dirt. These pigs' European ancestors became some of the first domesticated animals thousands of years ago.