Dogs are our friends. In our life there are many special dogs. They can help people. A guide dog can help the blind people. It can help them walk on the road, take the bus and go shopping in a supermarket. A police dog can help the policemen find things and catch the bad man. A hunting dog can help people find some rabbits and birds. We can also see special dogs at the airport. They can help people to look for drugs(毒品). They're sniffer dogs. Some special dogs can help the firefighters find the people. They're research and rescue dogs.
