The dog (Latin Canis lupus familiaris) belongs to chordate, vertebrate, Mammalia, Mammalia, Carnivora, schizopodia and canine.Also known as "dog" in Chinese, dogs are distributed all over the world. Dogs, horses, cattle, sheep, pigs and chickens are called "six livestock".Some scientists believe that dogs were domesticated from gray wolves by early humans from 40000 to 15000 years ago.Known as "the most loyal friend of mankind", it is the pet with the highest feeding rate, and its life span is about 12 ~ 18 years . In Chinese culture, dog belongs to one of the twelve zodiac signs, ranking 11th among the twelve zodiac signs.以上参考：狗——百度百科
如何用英语介绍小狗？
