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How to Calculate your Dog's Age


Drs. Foster & Smith Educational Staff
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Calculate your Dog's Age

Age of Pet "Human Years"
1 year 15 years
2 years 24 years
3 years 28 years
4 years 32 years
5 years 36 years
6 years 40 years
7 years 44 years
8 years 48 years
9 years 52 years
10 years 56 years
11 years 60 years
12 years 64 years
13 years 68 years
14 years 72 years
15 years 76 years
16 years 80 years
17 years 84 years
18 years 88 years
19 years 89 years
20 years 93 years
21 years 96 years
22 years 99 years
23 years 103 years

Contrary to popular belief, one "dog year" does not equal seven human years. We've seen many 20-year-old dogs in our practice, but we are yet to even hear of any 140-year-old humans. Along the same line, a dog that is two years old is an adult. A 14-year-old teenager is just that... a teenager.

The most accurate way to determine the relative age of your dog is to know the life expectancy of your dog's breed. Small breeds tend to live longer, frequently 14 to 17 years or longer. Giant breeds, like Great Danes, have a life expectency that is significantly shorter. Even with that knowledge, however, there is no easy multiplier you can use to determine the relative age of your pet because of the many variables in the aging process of canines, particularly in the first few years.

While it is fun to know the relative age of your pet in human years, it can also help you understand your dog's behavior, his special needs as he gets older, and different nutritional requirements as he progresses through life.

The chart shown is a fairly accurate measure of the relative age of the average dog when compared to humans.

The good news is that pets, like people, have a longer life expectancy today than ever before; primarily due to better healthcare and nutrition.

 

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