Question 1

How do you calculate a dog's age in human years?

Accepted Answer

A dog's first year is roughly equivalent to 15 human years, and the second year adds about 9 more. After that, dogs age a few human years for each calendar year, with the exact rate depending on adult size — small breeds age more slowly in later years than large and giant breeds.

Question 2

Is one dog year really seven human years?

Accepted Answer

No. The 'multiply by seven' rule is a myth. Dogs age much faster than that in their first two years and then slow down, with the rate varying by breed size rather than staying constant.

Question 3

Do cats age the same way as dogs?

Accepted Answer

Cats follow a similar early curve to dogs — about 15 human years in the first year and 9 more in the second — but then age at a steadier roughly 4 human years per calendar year afterward, regardless of breed.

Question 4

Why do small dogs live longer than large dogs?

Accepted Answer

Small breeds grow more slowly and reach a stable adult stage that lasts many years, while large and giant breeds grow faster early on and tend to enter their senior years several years earlier.

How old is your pet, really?