Living to 20- Secrets to Chihuahua Longevity

It’s no secret that Chihuahuas are the “mighty mites” of the dog world. They’ve got the sass of a giant, the loyalty of a bodyguard, and—luckily for us—some of the longest lifespans in the canine kingdom.

While most big dogs are considered “seniors” by age seven, a Chihuahua is often just hitting their prime!

It’s not uncommon to hear about Chihuahuas reaching 17, 18, or even 20 years old or even older. But getting to those “platinum years” doesn’t happen by accident.

If you want your spicy little roommate to stick around for two decades, here are the secrets to help them get there.

1. Keep Them Lean (Every Ounce Counts!)

Because Chihuahuas are so tiny, even one extra pound is a huge deal. On a 5-pound dog, gaining a pound is like a human gaining 30!

Extra weight puts a massive strain on their tiny joints and, more importantly, their hearts.

To help them live longer, make sure you can feel their ribs (but not see them poking out). Switch high-calorie treats for tiny pieces of green beans or carrots. Your Chi might protest at first, but their heart will thank you.

2. Master the “Dreaded” Toothbrush

I know, I know—trying to brush a Chihuahua’s teeth can feel like trying to clean the teeth of a very tiny, very angry shark. But dental health is the #1 secret to longevity.

Because their mouths are so small, their teeth are crowded, which leads to plaque buildup and gum disease. Those bacteria don’t just stay in the mouth; they can travel through the bloodstream and damage the heart and kidneys. Regular brushing and professional cleanings are the best way to add years to their life.

And in between brushings, you can give them a dental treat. We love Ark Naturals and have been using them for years. You can also use water additives (my vet says he uses them for his dogs) and dental wipes.

3. High-Quality Fuel for High-Energy Pups

Since Chihuahuas eat such small amounts, every bite needs to count. Investing in high-quality dog food without a lot of “mystery fillers” makes a world of difference.

• Small Kibble: Look for formulas specifically designed for toy breeds to prevent choking and help with dental health.
• Make Your Own Food: You can make your own dog food to be sure of what the ingredients are. Just make sure to get your Vet’s approval of the recipe you use. You can check out mine here.
• Watch the Scraps: Human food is often too salty or fatty for their tiny systems.

4. Protect the “Soft Spot” and the Spine

Chihuahuas are fragile. Many are born with a molera (a soft spot on the skull), and their backs are prone to injury.

• Use a Harness: Never use a collar with a leash! Chihuahuas have very delicate tracheas that can collapse easily. A harness is a must. You can keep a collar on them for decorative purposes or to hold their tags. Just be sure you can fit two fingertips between the collar and your dog’s skin.
• Ramps or Pet Steps are Your Friends: Jumping off a high couch or bed can lead to back issues over time. Training them to use “doggy stairs” can save their joints.

5. Keep the Brain Busy

A bored Chihuahua can become a stressed Chihuahua. Since they are famous “Velcro dogs,” they thrive on interaction.

Interactive toys, short walks (weather permitting!), and basic obedience training keep their minds sharp. A happy, engaged brain helps keep the body young.

6. Regular “Check-Ups” (Even When They Seem Fine)

Chihuahuas are notorious for hiding pain—it’s part of that big-dog-in-a-small-body ego! Regular vet visits are crucial for catching things like heart murmurs or luxating patellas (wobbly knees) before they become major problems.

Early detection is the difference between a manageable condition and a life-shortening one.

At the end of the day, the real secret to a 20-year-old Chihuahua is consistency and love. They give us so much personality and devotion; the least we can do is keep their teeth clean and their weight down so they can boss us around for as long as possible!

Cathy Bendzunas

Pet Blogger

I have had dogs all my life. I have been a pet groomer, worked in a pet hotel, and a kennel, and have bred and showed dogs.