No they won't last forever, if your dog was human how old would he be?
Have you ever wondered how old your dog is in human years? Not all breeds age the same, so use the tips below to calculate your dog's "human" age.

How do you really know how old your dog is? How do you calculate dog years on a scale of human years?

Contrary to popular belief, dogs do not age at the rate of 7 human years for every year in dog years.
First and foremost, let's debunk an unfounded myth:
The theory "one dog year is equal to 7 human years" is known and known to all of us, is unfounded, not supported by science and the connection between it and reality is purely coincidental.
It is important to know that different races age differently. In general, small dogs live longer than larger dogs.

How to calculate dog years in relation to human life changes?
As a general guideline, the American Veterinary Medical Association breaks down the years of a dog's life in this way: 15 years of human life is equal to the first year of an average dog's life.
A year for an average dog equals about nine human years. And after that, each human year, meaning 365 days, would be about five years for an average dog.

What factors should be taken into account when calculating the years of your dog's life? Find out what your dog's real age is!

There are a large number of factors that must be taken into account, therefore it is not possible to attach a number of years to a dog without considering all the parameters.
Small dogs are generally considered 'old' at the age of seven, but we all know that they have a long time to live after they pass the age of 7.
Larger breed dogs have a shorter lifespan compared to smaller breeds and are often considered seniors when they are 5 to 6 years old.
We all know that pets age faster than people, and veterinarians also begin to see more age-related and aging-related problems in pets when they pass the 6-7 year mark.

Why do small dogs live longer than larger dogs?
This phenomenon has baffled scientists for years, and research has yet to explain the relationship between body mass and a dog's lifespan. In general, large mammals, such as elephants and whales, tend to live longer than small ones, such as chinchillas or hamsters. So why do small dogs have a longer average lifespan than large breeds?
Large dogs age at an accelerated rate, and their lives seem to happen in faster motion, literally in the blink of an eye.
Scientists concluded that every 4.4 kg of a dog's body mass reduced his life expectancy by a month. The reason for this is still unknown.There are opinions that arise as a reason for the relatively short life span of large dogs, for example, that large dogs are more likely to succumb to diseases associated with earlier age and that the accelerated growth of large dogs may lead to a higher likelihood of abnormal cell growth and death from cancer.

Is my dog ​​still a puppy?
Although they may grow up and start to look less like a typical puppy, puppies continue to need extra nutritional support for much longer than you think. Puppies mature into adult dogs at a different time from breed to breed, which means that a large dog breed will mature into an adult dog at around 15 months of age, while smaller breeds will only be puppies for 9 months. So you will need to feed a larger dog breed puppy food for a longer period of time.
They won't stay puppies forever, when they grow up they will change
Puppies experience many physical changes as they develop into adult dogs. Physical size and shape change as bones lengthen and harden, joints mature, and muscles, ligaments, and tendons grow to the adult size of their breed.The fur changes from a configuration of silky softness to a configuration of dense and harder fur. The puppy teeth fall out and are replaced by permanent teeth of adult dogs. And the immune system is strengthened so that your dog is ready to face the big, wide, outside world.