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Pigs are misunderstood (误解). Some people think of them as lazy and stupid. Did you know that pigs are very smart? Pigs are smarter than most pets and wild animals. 3 Experts say that pigs are easier to train than dogs and cats. Would you want a pig for a pet?

Keeping a pet pig is fun, but it is work. Pigs like to go for walks like a dog. Would you like to walk a pig down your street? They can be trained to do tricks, and they like to be petted. They usually get along with other pets.

Pet pigs must be kept on a diet (节食). They like to eat like hogs (肉猪)! 4 An adult pet pig should not weigh more than 150 pounds. But many weigh up to 300 pounds because of overfeeding.

Pigs are some of the cleanest animals on the earth. They can learn to use a little like a cat. Many live in houses and apartments. But they can get in the way.

Pigs have a good sense of smell. They help find truffles(松露）in the forests. These plants sell for high prices. So the pigs are valued for their work.

Besides pork （meat from pigs）, pigs provide us with many useful products. Pig hair is used to make hairbrushes and furniture（家具）. Some of pig parts can be used to help sick people.

Pigs are found in every part of the world. They serve many useful purposes. They can work as guards like dogs. In the United States, two pigs were kept to guard the gate on the farm, which worked really well.