Aging a Chihuahua

Aging a Chihuahua is always a difficult thing to do if they are a rescue simply because you don't know when they were born exactly, what kind of care they received prior to coming to the rescue and because of their small size, they live longer.  The general public still believes in that "1 year equals 7 in human years" which is more accurate in medium sized dogs.

To more accurately calculate your Chihuahua's age, this is a pretty good guideline unless your Chi is grossly overweight and/or still intact.  Both situations decrease their life spans.  Intact males and females develop cancers much quicker in life, shortening their overall life spans.

As you can see, by the time a Chihuahua is actually a year old, he is a teenager by human standards!

Chihuahua Age	Human Age
3 months	3.75 months
6 months	7.5 years
9 months	11.75 years
1 year	15 years
1.5 years	19 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