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Most people have dogs as pets. But do you know that dogs can also do different jobs?
On September 11, 2001, terrorists attacked the US and nearly 3, 000 people died. At that time over 300 dogs were there to help to find and save people. They are working dogs.
The US army began to use dogs during World War I. Now, about
2,700 dogs are working in Afghanistan and Iraq, according to "Discovery News". These four-legged soldiers use their powerful sense of smell to find bombs(炸弹) ,drugs(毒品) and enemies.
Dogs are "man's best friends". They can help us work better.
The most common jobs for working dogs are in search and rescue. They can find lost people or bodies after a big disaster or in the wild.
Guide dogs can help blind people walk safely. These dogs can understand some words. Guide dogs are popular in the US and Japan. Many guide dogs visited China during the 2008 Olympic Games.
There are also dogs working with doctors. They can help autistic(自闭症的) children. These children sometimes don't talk and like to do the same things again and again. A study from Canada in 2010 showed that dogs could make autistic children feel relaxed and safe.
Herding dogs are important to sheep owners. They keep the sheep safe. They are common in Australia, New Zealand and some parts of China. Nowadays, many people have them as pets.
So dogs are not only our pets but also our workmates now.