Different breeds of dogs age differently. Use this chart to get an estimate on how old your chihuahua is in people years.

Dogs Current Age	Estimated People Age
3 Months	3.75 Years
6 Months	7.5 Years
9 Months	11.25 Years
12 Months*	15 Years
18 Months*	19.5 Years
2 Years	24 Years
3 Years	28 Years
4 Years	32 Years
5 Years	36 Years
6 Years**	40 Years
7 Years	44 Years
8 Years	48 Years
9 Years	52 Years
10 Years	56 Years
11 Years	60 Years
12 Years	64 Years
13 Years	68 Years
14 Years	72 Years
15 Years	76 Years
16 Years	80 Years
17 Years	84 Years
18 Years	88 Years
19 Years	92 Years
20 Years	96 Years
It is rare that Chi's live past 20, but if you are one of the lucky ones that has a chi over 20, add 4 years for each year over 20.

*At this time you can switch your puppy's over to an adult food.

**At this time you can switch your chi's diet over to a senior diet.