How Long Do Chihuahuas Live? The Real Lifespan and What Decides It
Updated: 13 hours ago
By Nick, co-founder of Doggy Styles Inc and owner of Bruno, a rescued French Bulldog. Last updated 16 October 2026.
Quick Answer
How long do Chihuahuas live? Many live into their early or mid teens, and small breeds are among the longest-lived dogs. But a long life isn't automatic. In the largest UK study of Chihuahuas under veterinary care, the median age of the dogs that died during the study year was 8.2 years. That isn't how long a typical Chihuahua lives: the dogs studied were young, so the deaths recorded were mostly early ones. It does show how many die early, often from things that can be reduced, such as injuries, and how common dental disease and weight gain are. Where your Chihuahua lands depends a lot on his teeth, his weight, his heart and how well he's protected from falls and bigger dogs. Nothing guarantees extra years, but most of the big risks are ones owners can do something about.
Key takeaways
Well-cared-for Chihuahuas often reach their teens, but UK vet records show many die younger.
The headline 8.2-year figure is the median age at death in a young population, not a life expectancy.
Teeth, weight and injury prevention are the three biggest things owners control.
If you're still getting to know the breed, start here:
How long do Chihuahuas live? What people get wrong
The usual assumption is simple: small dog, long life, job done. Small dogs do tend to outlive big ones. But "can live to 18" and "will live to 18" are very different promises, and the gap between them is mostly made of teeth, kilos, sofas and the occasional Great Dane in the park.
Owners know how much there is to love, and how much there is to look after. Romeo's owner, on Purina's owner stories, describes him as "the sweetest quirkiest little boy". The same owner names one of the biggest challenges as "Trying to brush his teeth". Both of those statements, as it turns out, are about lifespan.
The first check-up
Week one. The vet lifts him onto the scales: 1.4 kilos of indignation. She checks his heart, his knees, his teeth and the soft spot on top of his head, and tells you he's in good shape. Then she says the sentence every new Chihuahua owner hears: "Look after those teeth, keep him slim, and don't let him jump off things." You nod. You have no idea yet how much of the next fifteen years those three instructions will cover.
Chihuahua lifespan at a glance
Life stage | Roughly | What matters most |
Puppy | Birth to 1 year | Regular small meals, vaccinations, safe handling, checking baby teeth fall out |
Young adult | 1 to 7 years | Teeth, weight, knees, and avoiding falls and fights |
Middle age | 7 to 11 years | Twice-yearly checks, heart and breathing, dental care |
Senior | 11 years and over | Comfort, warmth, joints, heart, kidneys and appetite |
Owners recognise every stage. The puppy who fits in one hand and treats the sofa as a cliff edge. The young adult who acts as if he's three times his size. The middle-aged dog who's slightly rounder than the vet would like. The senior who moves a little slower and sleeps a lot more, and is no less in charge.
That small, long-lived, slightly bossy companion is what Doggy Styles Inc designs around: clean, minimal Chihuahua pieces for people who are in it for the long haul, and plan to be bossed about for most of it.
👉 Shop Chihuahua women's t-shirts, unisex t-shirts and sweatshirts and hoodies
👉 or explore the full CHIHUAHUA COLLECTION
What the research says about Chihuahua lifespan
Small dogs tend to live longer
In 2024, Kirsten McMillan and colleagues at Dogs Trust and Liverpool John Moores University analysed 584,734 UK dogs. The overall median lifespan was 12.5 years, and large breeds had around a 20% higher risk of a shorter life than small breeds. Small, long-nosed breeds did best, with a median of 13.3 years as a group (McMillan and colleagues, Scientific Reports, 2024). The Chihuahua is about as small as dogs come, with a normal-length nose, so on paper he's built for a long innings.
What UK vet records show
The most detailed Chihuahua-specific study tells a more complicated story. Dan O'Neill and colleagues at the Royal Veterinary College studied 11,647 Chihuahuas seen by UK vets in 2016. Of the 102 that died during the study, the median age at death was 8.2 years: 10.2 for females and 6.9 for males. The most common recorded causes of death were heart disease (18.8%), lower respiratory tract disorders (16.3%) and traumatic injury (13.8%) (O'Neill and colleagues, BMC Veterinary Research, 2020).
Median age at death is not life expectancy
The authors were clear that the 8.2-year figure should be "interpreted cautiously". The Chihuahuas in the study were young, with a median age of just 2.8 years, because the breed's popularity had grown so fast: Chihuahuas went from about 1% of puppies born in 2005 to over 5% in 2016. In a young population, the deaths that happen are more likely to be early ones, so the figure is pulled down. Only 102 deaths were recorded, which is a small number to build a lifespan on. Life expectancy, how long a puppy can expect to live, needs a population followed through to old age, and this study wasn't designed to measure that.
So the honest answer is this. A Chihuahua that avoids the early risks can live well into his teens. But the early risks are real, and many are preventable. As Dan O'Neill put it, "the recent craze for them can cause some real welfare issues for this tiny dog" (Royal Veterinary College).
Trembling in an older Chihuahua is one of the early clues worth taking seriously.
What shortens a Chihuahua's life, and what helps
Problem | How common | What helps |
Heart disease | The most common recorded cause of death (18.8%) | Listen for a cough or tiring easily; have his heart checked at every vet visit, especially from middle age |
Breathing problems, including tracheal collapse | 16.3% of recorded deaths were lower respiratory disorders | Harness, not collar; keep him slim; avoid smoke and overheating |
Injuries | 13.8% of recorded deaths | Steps not jumps, careful carrying, no rough play with big dogs, secure gates |
Dental disease | Recorded in 13.5% of Chihuahuas in a single year | Daily brushing, dental checks, early treatment |
Obesity | Recorded in 5.9% | Weighed meals, few treats, regular walks |
Retained baby teeth | Recorded in 5.7% | Check by about six months, and ask your vet to remove any that stay |
Figures are from the RVC VetCompass study above. Recorded percentages show what vets diagnosed and wrote down during 2016, so mild problems that never reached a vet don't appear.
The health problems that shape a Chihuahua's life
Dental disease. The most commonly recorded problem in the breed. Small mouths crowd teeth together, which traps food and plaque. A wider VetCompass study of dental disease found dogs under 10 kg had around three times the risk of dogs weighing 30 to 40 kg (Royal Veterinary College, 2021). Signs: bad breath, red gums, dropping food, chewing on one side, pawing at the mouth.
Retained baby teeth. Some puppy teeth don't fall out, leaving two teeth in one space. They trap food and speed up gum disease. Your vet can remove them, often during neutering.
Kneecaps that slip. Patellar luxation is more common in small breeds, and a VetCompass study named Chihuahuas among the three breeds at highest risk, with Pomeranians and Yorkshire Terriers (Royal Veterinary College). Signs: a skip or hop for a few steps, or holding a back leg up, then running normally. Keeping him lean and building muscle helps. Severe cases may need surgery.
Heart disease. Small, older dogs commonly develop a leaky heart valve, often first heard by the vet as a murmur. Signs: coughing, especially at night, tiring quickly on walks, faster breathing at rest. Caught early, medication can help many dogs live comfortably for longer.
Tracheal collapse. The windpipe weakens and flattens, causing a dry "goose honk" cough, often worse with excitement or pulling on the lead. Chihuahuas are one of the breeds prone to it, and vets advise a harness instead of a collar and keeping weight down (VCA Animal Hospitals).
Low blood sugar in puppies. Tiny puppies can become hypoglycaemic if they miss meals or get cold or ill. Little-and-often feeding in the early months matters a great deal.
The preventable years: injuries
Traumatic injury caused nearly one in seven recorded Chihuahua deaths in the vet study. That's the cause owners have most control over.
Falls. Toy breeds can break their forearm bones jumping or falling from surprisingly low heights, including from an owner's arms or the sofa, and these fractures can be hard to heal (Science for Animal Welfare). Use pet steps for sofas and beds, and teach everyone to carry him properly.
Being stepped on. A Chihuahua who shadows your feet is easy to tread on, especially in the dark, on stairs or in a busy kitchen. A bell on his harness, and a habit of looking down, really do help.
Bigger dogs. Even friendly play from a large dog can injure a two-kilo body. Choose playmates his size, and pick him up calmly if a big dog comes bounding over.
Cars and doors. Small dogs slip through gaps quickly. Secure gates, a stair gate at the front door and a well-practised recall all count.
The everyday reality of protecting a dog this small is a big part of living with one.
The sofa leap
Month four. He's discovered the sofa, and the joy of jumping off it to greet you. Each time, he lands with a small thud and carries on, delighted. Your vet mentions, casually, how often she sees broken legs in toy breeds. That weekend, a set of pet steps appears beside the sofa. He ignores them for two days, then uses them as if he's been doing it all his life.
Teeth: the daily habit that matters most
If there's one habit that most changes a Chihuahua's later years, it's brushing his teeth. Romeo's owner isn't alone. Most Chihuahuas need persuading. Here's a plan that works for most.
Step one: get him used to touch. For a few days, lift his lip gently, touch his teeth with a finger and give a treat. Keep it to seconds.
Step two: add dog toothpaste. Let him lick some off your finger. It's designed to taste good to dogs. Never use human toothpaste.
Step three: finger brush. Rub the paste along the outside of the back teeth, where plaque builds up most. A few seconds a side.
Step four: small toothbrush. Swap to a small-headed dog toothbrush, at a 45-degree angle to the gumline, in small circles.
Step five: make it daily. Daily brushing is the target. Pair it with a routine he likes, such as just before his last meal or bedtime treat.
Dental chews can help a little but don't replace brushing. And even with brushing, most Chihuahuas will need a professional clean under anaesthetic at some point. Regular checks catch problems while they're small and cheaper.
The bad breath
Month seven. He climbs onto your lap and yawns in your face. The smell is remarkable. At his check-up, the vet shows you red gums and tartar on the back teeth, and books him in for a clean. He comes home with two fewer teeth, sleeps for an afternoon, then eats his dinner with obvious relief. You buy a finger brush that evening.
Weight, food and fussy eaters
Chihuahuas need very little food, which makes it easy to overfeed by accident. A few extra treats a day are a large share of a two-kilo dog's diet. Equally, some are notoriously picky. Sanchez's owner, on Purina, says simply: "He is such a fussy eater it's unreal", and lists "Food refusal" among the biggest challenges.
Weigh his food. Use kitchen scales, not a scoop. The difference of a few grams is real at this size.
Count the extras. Treats and titbits come out of his daily allowance. Tiny training treats, or pieces of his own kibble, go a long way.
Use a body check, not just the scales. You should be able to feel his ribs easily and see a waist from above.
For fussy eaters, keep it boring. Set meal times, put the bowl down for 15 to 20 minutes, then take it away. Topping every meal with something tastier teaches him to wait for something tastier.
Don't ignore real appetite loss. Refusing food for more than a day, or eating less while losing weight, is a vet visit. Dental pain is a common hidden cause.
Choosing a healthier Chihuahua puppy
See the parents. Meet at least the mother, see where the puppies are raised and ask about the parents' health, including knees, heart and teeth.
Avoid "teacup" marketing. The Kennel Club standard describes a Chihuahua of up to 2.7 kg, with 1.8 to 2.7 kg preferred. Deliberately tiny dogs bred below that aren't a premium version. They're often more fragile.
Ask about health checks. A good breeder will have the parents' knees and hearts checked by a vet and will happily talk you through any problems in their lines.
Expect questions back. Good breeders want to know about your home, children and other pets. A breeder who'll sell to anyone, quickly, is a red flag.
Consider an adult. Rescue Chihuahuas are common, and an adult's health and temperament are already visible.
Health is only one part of the decision. The full list of trade-offs, including costs, is in the pros and cons post.
Normal ageing, or worth a vet visit?
Normal ageing: sleeping more, a greyer muzzle, slower walks, feeling the cold more, a little stiffness when first getting up.
Worth a vet visit: a new cough, especially at night; breathing faster at rest; drinking or weeing much more; losing weight; bad breath or dropping food; skipping or holding up a back leg; confusion, pacing or restlessness at night; any lump that's new or growing.
Caring for an older Chihuahua
Older Chihuahuas need a little more of everything: warmth, comfort, routine and vet attention. Twice-yearly check-ups from about eight years old catch heart, dental and kidney problems while they're still manageable. Keep him warm, because older dogs lose muscle and feel the cold more. Use steps and ramps everywhere he likes to climb. Keep walks short, gentle and frequent. And keep his weight steady: in a senior, unexplained weight loss is a reason to see the vet, not a success. Many senior Chihuahuas still enjoy children, but they need a calmer, gentler version of family life.
What not to do
Don't skip the teeth. Dental disease doesn't just cause bad breath. It's painful, and it affects appetite and quality of life.
Don't let him jump from heights. Sofas, beds, arms and car seats are all big drops for a dog this size.
Don't use a collar for walks. A harness protects a vulnerable windpipe.
Don't let him get fat. Extra weight is harder on the knees, heart and windpipe.
Don't ignore a cough. In a Chihuahua it can mean the heart or the windpipe, and both are easier to manage when caught early.
How to give a Chihuahua the best chance of a long life
The aim isn't to wrap him in cotton wool. It's to reduce the risks that most often cost Chihuahuas years.
In the moment
Use the steps, every time, and lift him properly when you carry him.
Walk him on a harness, and pick him up calmly if a big dog bounds over.
Weigh his dinner and count the treats.
Long term
Brush his teeth daily. The single habit with the biggest pay-off.
Keep him lean. Ribs easy to feel, waist visible from above.
Go to every check-up. Yearly while young, twice a year from about eight. Ask the vet to listen to his heart and check his knees and teeth every time.
Make home safe for a small dog. Steps, gates, a bell, and a household that looks down before stepping back.
Train for handling. A Chihuahua who's happy to have his mouth, paws and body handled is far easier to examine and treat at every age, and the training guide shows how.
The weigh-in
Month ten. Back on the vet's scales. He's 2.1 kilos, exactly the same as six months ago. His teeth are clean, his heart sounds good and his knees are firm. The vet says "keep doing what you're doing". He takes the treat she offers, then another, then looks at you as if to say the system works, but it could be more generous.
When to get professional help
If your Chihuahua starts coughing, breathes fast at rest, loses weight, goes off his food, drinks much more than usual, or seems confused or in pain, see your vet. Many of the conditions that shorten Chihuahua lives are far more treatable when they're caught early.
Do Chihuahuas live longer than other breeds?
Usually, yes. Small breeds tend to outlive large ones, and the Chihuahua is among the smallest of all. A Chihuahua that avoids the early risks can comfortably outlive many larger breeds. But size alone doesn't guarantee it. A slim Chihuahua with clean teeth, protected from falls, has the best odds. One who's overweight, never has his teeth checked and launches himself off the furniture daily is spending his luck in advance.
What Chihuahua owners realise over time
Most owners find that a long life with a Chihuahua isn't luck alone. It's a lot of small, boring habits: the toothbrush, the scales, the steps, the harness, the check-ups. None of them takes long. All of them add up. And the reward, with some luck, is a dog who's still bossing the household around at fifteen.
The first check-up, a year on
A year after that first visit to the scales. He trots into the vet's on his harness, sits on the scales without being asked and opens his mouth for the vet with only a mild look of disgust. Teeth clean. Heart clear. Knees firm. The vet writes "excellent" on his notes. He'd like it noted that he's been excellent all along.
The verdict
How long do Chihuahuas live? Many live into their teens, and small breeds are among the longest-lived dogs. But UK vet records show plenty of Chihuahuas die younger, from heart disease, breathing problems and injuries, with dental disease and weight gain affecting many more. The headline 8.2 years is a median age at death in a very young population, not a prediction for your dog. The habits that give him the best chance are simple and in your hands: daily tooth-brushing, careful feeding, steps not jumps, a harness and regular vet checks.
If you're still getting to know the breed, the guide covers the full picture.
Living with a Chihuahua means signing up for a long, opinionated friendship. The Chihuahua range is for people who are in it for every year of it.
👉 Explore Chihuahua women's t-shirts, unisex t-shirts and sweatshirts and hoodies
👉 or explore the full CHIHUAHUA COLLECTION
Got a senior Chihuahua still running the house? Show us. Tag @doggystylesinc on Instagram or find us on Facebook at Doggy Styles Inc, and your Chihuahua could feature in a future post.
Continue Understanding the Chihuahua Breed
FAQs
How long do Chihuahuas live?
Many live into their early or mid teens. UK vet records show many die younger, often from heart disease, breathing problems or injuries, so care makes a big difference.
What is the average lifespan of a Chihuahua?
A large UK study found small breeds as a group had a median lifespan of about 13 years. A Chihuahua-specific study found a median age at death of 8.2 years, but in a very young population, so it isn't a fair lifespan figure.
Is 8.2 years how long Chihuahuas live?
No. It's the median age of the Chihuahuas that died during one year of a UK study, most of which were young dogs. It shows early deaths are common, not that most Chihuahuas die at eight.
Do female Chihuahuas live longer than males?
In the UK vet study, females that died had a median age of 10.2 years and males 6.9, but the numbers were small and the authors urged caution.
What do Chihuahuas usually die from?
The most common recorded causes in UK vet data were heart disease, lower respiratory problems and traumatic injuries.
What are the most common Chihuahua health problems?
Dental disease, obesity, retained baby teeth, slipping kneecaps, heart valve disease and tracheal collapse.
How can I help my Chihuahua live longer?
Brush his teeth daily, keep him lean, use steps and a harness, protect him from falls and big dogs, and keep up regular vet checks. Nothing guarantees extra years, but these reduce the biggest risks.
When is a Chihuahua considered old?
Many vets treat small dogs as seniors from about 10 to 12 years old, with twice-yearly checks from around eight.
Do teacup Chihuahuas live as long?
Deliberately tiny "teacup" dogs are often more fragile and prone to problems. The breed standard prefers 1.8 to 2.7 kg.
Why does my old Chihuahua cough?
A cough in an older Chihuahua can be a sign of heart disease or a weakening windpipe. Both are worth a vet check promptly.
Does brushing teeth really help a Chihuahua live longer?
It's the habit vets recommend most for this breed, because dental disease is so common and painful. It won't guarantee extra years, but it protects his comfort and appetite.
How old is the oldest Chihuahua?
Some Chihuahuas are reported to have lived into their late teens or beyond, but these are exceptional. With good care, many owners can reasonably hope for the teens.
Comments