rel="nofollow" href="#ulink_b5e96d36-c73d-55e7-8165-c83d4ca7bcb5">Tables 1.2.1 and
1.2.2 ); in the future there will likely also be ways to assess genetic aspects of aging (e.g., telomeres, DNA methylation, etc.).
Table 1.2.1 Approximation for converting “dog” years to relative human years, as well as matching life stages based on adult weights
<10 kg
10–20 kg
20–30 kg
30–40 kg
40–50 kg
>50 kg
Age
Life Stage
Relative Human Age (Years)
Life Stage
Relative Human Age (Years)
Life Stage
Relative Human Age (Years)
Life Stage
Relative Human Age (Years)
Life Stage
Relative Human Age (Years)
Life Stage
Relative Human Age (Years)
3 months
Puppy
4
Puppy
4
Puppy
3
Puppy
3
Puppy
3
Puppy
3
6 months
Puppy
7
Puppy
7
Puppy
6
Puppy
6
Puppy
6
Puppy
6
9 months
Young
11
Young
11
Puppy
9
Puppy
9
Puppy
9
Puppy
9
12 months
Young
15
Young
15
Puppy
12
Puppy
12
Puppy
12
Puppy
12
18 months
Young
19
Young
19
Young
16
Young
16
Puppy
16
Puppy
16
2 years
Young
24
Young
24
Young
19
Young
19
Young
19
Young
19
3 years
Mature
28
Mature
28
Mature
25
Mature
26
Mature
26
Mature
27
4 years
Mature
32
Mature
32
Mature
30
Mature
32
Mature
33
Mature
35
5 years
Mature
36
Mature
36
Mature
36
Mature
38
Mature
40
Senior
42
6 years
Mature
40
Mature
40
Mature
42
Senior
46
Senior
47
Senior
50
7 years
Mature
44
Senior
45
Senior
48
Senior
53
Senior
54
Senior
56
8 years
Senior
48
Senior
49
Senior
53
Senior
57
Senior
58
Senior
61
9 years
Senior
52
Senior
53
Senior
58