A year of the dog equivalent to a few years old

A year old dog is the human equivalent of 18 years old, when the dog becomes an adult. Usually dogs can live about 12-14 years, so when dogs reach about 8 years old, they are very old and their body functions will deteriorate. At this time the owner should take care of the dog carefully, or the dog will easily die because of disease. Generally speaking, the life expectancy of a dog is about 15 years, but for the vigorous action of hunting dogs or competition dogs, its life expectancy is shorter. Dogs kept in the home usually live longer, some up to 20 years.