How many years is the life expectancy of a dog as a human?

A dog’s life expectancy is about 18 years of a human’s in a year, because when a dog is 1 year old, it is equivalent to a human being reaching the age of 18. A dog’s life span is about 15 years, and when it reaches the age of eight, it has entered old age. Dogs are no longer lively and active, have lost their former vitality, are not as vigorous and sleep for longer periods of time. Owners should pay attention to the dog’s deworming, immunization, cleaning and other work. Regular deworming and vaccination can enhance the dog’s resistance and prevent it from contracting infectious diseases. This can extend the life of the dog.