# How to determine the age of your dog in human terms?

If you have ever had a pet, you certainly could be interested in the question about how old can be your pet in this or that period of his life in the human equivalent. It is known that the average life expectancy of dogs ranges from 6-7 years old up to 17-18 depending on its breed and size, but how many years can be these figures in terms of human age? In order to make it easier to navigate to the age of your pet, a team of researchers from the University of California have developed a special formula based on changes in DNA over time.

The average life expectancy of a small domestic dog is about 17 years

## How to determine how old is the dog?

People and dogs have one very unpleasant property — they age. Over time our DNA adds a special methyl group, changing the activity of certain segments of deoxyribonucleic acid, while not changing the very DNA. Knowing this, the team of scientists decided to apply the so-called method of methylation for the study of epigenetic mechanisms or age-related changesoccurring within every living being on the planet.

Despite the fact that the life expectancy of dogs of different breeds varies greatly, they all show similar development path, going through the standard stages of the life of any organism. As the portal sciencealert.comto conduct an unusual experiment, the researchers used a blood test dog breed Labrador Retriever by comparing the data with the methylation profiles of blood 320 people at the age from one to 103 years of blood parameters 133 mice.

`See also: What does a dog, when she screaming?`

Despite the different life expectancy of the dog pass through the main stages of growing up and aging, similar to human

As a result of comparison metromom dogs with human, the scientists were able to derive a formula to calculate the human age of the animal:

the age of the person = 16ln (age of dog) + 31.

Multiplying the natural logarithm of the age of the pet in years to 16, and then adding 31, you can get the most desired number that will show “human years” your dog.

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Using the formula, the researchers were able to establish that the seven-week age in dogs corresponds to nine months in humans, when humans and puppies begin to erupt teeth. At the same time, the 12-year-old dog is approximately equal to the age of 70-year-old man. Due to the fact that different breeds of dogs and age differently, we likely will never find any universal approach to determine the age of the animal. However, the formula based on the use of epigenetic hours of the body, in any case will be able to tell at least an approximate result.