Dog age calculator
It's a common misconception that dogs age seven years for every one human year they're alive. There's actually an enormous amount of variability between breeds, and dogs age much faster during puppyhood than adulthood.
In fact, for the first two years of their lives, Jack Russell puppies age 12.5 'dog years' for every one human year. Bigger dogs, such as the Boxer, actually age slower during the same period.
However, this completely turns around during adulthood, as smaller dogs tend to age at a slower rate than bigger dogs after the age of three human years. Jack Russells can therefore live up to 16 human years and more, whereas Bulldogs are known to sadly last for only nine.
Dog's age in human years:
The dog's breed:
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