Steve Goldstein for The New York Times and Fred Greaves, via ReutersIs your dog a senior or a teenager?

Most people think that one dog year equals seven human years. But according to WebMD, your dog’s real age is not that simple:

Dogs mature more quickly than children in the first couple of years. So the first year of a dog’s life is equal to about 15 human years, rather than seven.

Size and breed also influence the rate at which a dog ages. Although smaller dogs tend to live longer than larger dogs, they may mature more quickly in the first few years of life. A large dog may mature more slowly at first but already be considered elderly at age 5. Small and toy breeds don’t become “seniors” until around age 10. Medium-size breeds are somewhere in the middle in terms of maturation and life span.

To find out how old your dog really is, check out WebMD’s dog age calculation chart, which estimates your dog’s equivalent human age based on how old it is and whether it is a small, medium or large breed.

fr/   http://well.blogs.nytimes.com/2011/08/03/calculating-the-real-age-of-your-dog/