Dog's age - human age (rough comparison table)

1 month old - 1 year old

　2 months old - 3 years old

　3 months old - 5 years old

　6 months old - 9 years old

9 months old - 13 years old

1 year old —— 17 years old

1 and a half years old - 20 years old

2 years old - 24 years old (the mind has become stable at this time)

　3 years old —— 28 years old

　4 years old —— 32 years old

　5 years old —— 36 years old

6 years old - 40 years old (beginning to enter middle age, body functions begin to degrade, no longer suitable for reproduction)

　7 years old —— 44 years old

8 years old - 48 years old

9 years old - 52 years old

10 years old - 56 years old

11 years old - 60 years old

12 years old - 64 years old

13 years old - 68 years old

14 years old - 72 years old

15 years old - 76 years old

16 years old - 80 years old

17 years old - 84 years old

18 years old - 88 years old

19 years old - 94 years old

20 years old - 96 years old (quite long-lived)