PIG IS THE NEATEST ANIMAL

Contrary to popular belief, pigs are unable to sweat; instead, they wallow in mud to cool down. Their mucky appearance gives pigs an undeserved reputation for slovenliness. In fact, pigs are some of the cleanest animals around, refusing to excrete anywhere near their living or eating areas when given a choice.

The domestic pig (Sus domesticus), often called swine, hog, or simply pig when there is no need to distinguish it from other pigs, is an omnivorous, domesticated even-toed ungulate. It is variously considered a subspecies of the Eurasian boar or a distinct species, but the American Society of Mammalogists considers it the latter. The domestic pig's head-plus-body length ranges from 0.9 to 1.8 m (2 ft 11 in to 5 ft 11 in), and adult pigs typically weigh between 50 and 350 kg (110 and 770 lb), with well-fed individuals often exceeding this weight range. The size and weight of hogs largely depends on their breed. Compared to other artiodactyls, a pig's head is relatively long and pointed. Most even-toed ungulates are herbivorous, but domestic pigs are omnivores, like their wild relative. Pigs "grunt" and make "snorting" sounds.