1 Year Old –
By this age, the silliness of puppy-hood is just about done, however since most Chihuahuas have such amazing personalities, you will see that your dog has a good sense of humor and a charming personality that will stay for life. The Chihuahua is now considered an adult.
Growth is most rapid and noticeable during the first year. It can be quite a roller coaster ride… Sometimes you will see a clear difference in just a week…other times, it will slow down with seemingly no change, only to be followed by a quick growth spurt.
By the end of Year 1, growth is done for most. Many Chihuahua dogs will not grow taller after the age of 1 year to 1.5 years, however they will still slowly fill out in width (chest area will be most noticeable). Weight increases will be negligible. If your Chihuahua gains any considerable amount after the 1 year mark, you will want to discuss this with your veterinarian to rule out any possible health concerns. He or she is now just about fully grown.
10 Years Old –
At this age, a Chihuahua is considered to be a senior. He or she may not seem like a senior
; however some things will need to change and you may start to notice some signs of aging.
Your Chihuahua may not want to go for walks as often, and that is okay. What you will want to do is to break up the exercise
time. For example, instead of going for one 30 minute walk per day, break this up into two 15 minute walks.
Now is the time to transition to senior formula food and supplements. If you home cook, only the vitamin and supplement should be switched to a senior formula.
Many Chihuahuas develop joint pain and muscle discomfort by this age and obtaining an orthopedic canine bed can be beneficial for the dog. Veterinarian visits will now be more frequent, usually twice per year, since geriatric screenings will now be done.
Chihuahua to Human Age Equivalency
Long ago, the aging of dogs was quickly summed up by saying that they aged 7 years for every 1 human year. That was a wild estimation. Today, we have the ability to understand the aging process in a much more detailed way.
Toy dogs will mature faster than large breed dogs. However, they generally have a longer life span
For example, a Shepherd is considered a puppy until the age of 2. However, life span for a Shepherd is 9 to 13 years. A Chihuahua is only a puppy until the age of 1, but his life span is 14 to 18 years.
Now, since the Chi is the smallest of all toy breeds, he will mature in the following way:
Let’s look at this chart:
Age of Chihuahua Human Equivalent
6 months 5