As we all know ,dogs are considered to be the best friends of human nature.In ancient times,dogs help our ancestor to hunt and guard.While in modern times,dogs are our faithful companions.Playing with dogs can make children feel happy then ease the loneliness.Recently,people have trained dogs to do certain work.For example,dogs can be the guide for the blind when they are walking on the street.
However,there are also some problems with breeding dogs.Above all,dogs can spread diseases.If people don't take measures to the puppies,they are easy to be caught by the virus and if people are hurt by the sick dogs ,they are hard to cure.That's why some people would not like to feed dogs.
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