Pigs are very intelligent animals. According to the Humane Society, pigs are smarter than 3-year-old children. Domesticated pigs can be trained to do tricks and even use a litter box like a cat.
They are also very social. In the wild, pigs live in close-knit groups called sounders, according to the San Diego Zoo. Sounders consist of one male, many females and their young. Males without a sounder will form their own herds or be solitary. Bearded pigs can have sounders with up to 300 members.
Pigs communicate with a variety of grunts and squeaks. A short grunt, a longer growl and a loud roar will warn other pigs of approaching danger, according to the San Diego Zoo. The pigs’ primary defense is speed, but when cornered, their tusks can be formidable weapons. Their lower tusks can get to be about 3 inches long (7 centimeters) and are razor sharp.