Erin's pup Tiger turns five years old Saturday. Now, the general rule is to assume that a dog ages seven years physically every twelve months, but, in truth, that's not the case. Smaller breeds age more slowly and, generally, live longer than larger ones.

Take a look at the chart and compare how dogs of different sizes age 'in human years'. And Tiger, by the way, is a very young looking 36.

Age of dog Small breed -
age in human years
Medium breed -
age in human years
Large breed -
age in human years
1 15 15 15
2 24 24 24
3 28 28 28
4 32 32 32
5 36 36 36
6 40 42 45
7 44 47 50
8 48 51 55
9 52 56 61
10 56 60 66
11 60 65 72
12 64 69 77
13 68 74 82
14 72 78 88
15 76 83 93
16 80 87

120