Why Do Chihuahuas Shake? The Real Reasons (And When to Worry)
Updated: 5 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
Chihuahuas shake mostly because they get cold quickly. A dog that weighs under three kilos has very little body to hold heat and a lot of surface to lose it from, so a cool kitchen floor can be enough to start the trembling. The other common causes are excitement, nerves and anticipation, all of which this breed feels at full volume. Less often, shaking is a sign of something medical: low blood sugar in puppies, pain, nausea, poisoning or a tremor condition. Brief shaking that stops when he's warm, calm or fed is normal. Shaking that won't stop, or comes with weakness, wobbliness, vomiting or a dog who just isn't himself, needs a vet.
Key takeaways
Cold is the most common reason. Chihuahuas lose heat fast and feel it early.
Excitement and nerves cause plenty of trembling too, and they can look identical to cold.
Shaking with weakness, wobbliness, vomiting or confusion is a vet visit, not a jumper.
Call your vet straight away if the shaking comes with: weakness or wobbliness, glassy eyes or confusion, vomiting or diarrhoea, collapse or a seizure, signs of pain such as a hunched back or yelping, or if he might have eaten chocolate, xylitol, medicines or anything else he shouldn't have. In a tiny puppy who seems weak or sleepy, treat shaking as an emergency.
If you're still getting to know the breed, start here:
Why do Chihuahuas shake? What people get wrong
Most people assume a shaking Chihuahua is either freezing or terrified. Sometimes he is. Just as often he's thrilled, expectant, slightly offended or simply waiting for you to notice that the blanket has slipped. The trembling looks the same. The reasons are very different, and so is what helps.
Owners learn the warmth part quickly. Chewy's owner, on Purina's owner stories, puts it as house policy: "All blankies belong to him." Koda's owner, also on Purina, describes him as "Just a seal with legs." A seal, notably, with almost none of the insulation.
The kitchen tiles
Week one. It's a mild September evening and the heating isn't on. You put his dinner down on the kitchen tiles. He eats it in seconds, then stands on the tiles, trembling from ears to tail. You panic slightly and pick him up. Within a minute, tucked inside your jumper, he's stopped completely and appears to be asleep. You've learned the first rule of the breed: floors are not furniture.
Shaking, shivering or something else? A quick guide
What you see | What's usually behind it | What to do |
Shivers on cold floors or outdoors, stops when warm | Cold | A blanket, a jumper, rugs over tiles |
Quivers at the door before a walk, tail going | Excitement | Nothing. Enjoy it |
Trembles at the vet, in the car or at fireworks | Fear or stress | Calm, distance, a safe den |
Trembles at the dinner table, stops when the plate's empty | Anticipation | Don't reward it, reward calm instead |
Shaking with a hunched back, yelping or not eating | Pain or illness | A vet check today |
Weak, wobbly, glassy-eyed or collapsing | Low blood sugar, poisoning or a serious problem | An emergency vet, now |
Owners recognise the top four rows within a month. The tremble at the door before every walk. The shiver after the bath that lasts exactly as long as the drying takes. The quiver at the dinner table, which stops instantly when the plate is empty. The bottom two rows are rare, which is exactly why they're worth knowing.
That small, theatrical, always-slightly-chilly character is what Doggy Styles Inc designs around: clean, minimal Chihuahua pieces for people who now check the weather forecast for someone who weighs less than a bag of sugar.
👉 Shop Chihuahua women's t-shirts, unisex t-shirts and sweatshirts and hoodies
👉 or explore the full CHIHUAHUA COLLECTION
Why do Chihuahuas shake so much?
Built to lose heat
The Kennel Club breed standard puts the ideal Chihuahua at up to 2.7 kg, with 1.8 to 2.7 kg preferred. That's a very small body with very little fat, and a lot of skin and ear relative to its size. Small bodies lose heat faster than large ones, because they have more surface for every gram of dog. Shivering is simply how muscles make heat quickly. The PDSA's vets put it plainly: smaller breeds, "like Chihuahuas and small Terriers, can feel the cold quickly" (PDSA). Smooth coats feel it most. Long coats help a little. Neither is a substitute for a blanket.
Wired for alert
The same breed standard describes the Chihuahua as an "alert little dog" with a "saucy expression". Alert dogs notice everything, and a Chihuahua's excitement tends to come out through his whole body at once. A visitor at the door, the lead coming off the hook, the sound of cheese: all can produce a full-body quiver that has nothing to do with temperature.
Nerves, and the view from below
Fear is the third big reason. Everything in a Chihuahua's world is enormous, including your feet, your vacuum cleaner and most other dogs. A tremble is a common sign of a dog who's uneasy, and plenty of Chihuahuas are uneasy around new places, loud noises and unfamiliar people. Trembling around visitors in particular has a post of its own, with a script for your guests.
What the research says
Vets see the nervous version every day. In a German study of 135 dogs at a veterinary practice, Dorothea Döring and colleagues found that 78.5% were fearful on the examination table, and fewer than half walked into the practice calmly (Döring and colleagues, The Veterinary Journal, 2009). That's all dogs, not just Chihuahuas, and one practice rather than a national picture. A Chihuahua on a steel table at nose height to a stranger is simply giving one of the more visible performances.
Some shaking is medical rather than emotional. Generalised tremor syndrome, sometimes called "shaker syndrome", is a constant, rhythmic tremor seen mostly in small dogs, usually starting between one and two years old. It's worse with excitement and eases at rest, and vets treat it with medication, with a usually excellent outlook (VCA Animal Hospitals). It's uncommon, but it's the reason a new, constant tremor deserves a vet's eye rather than a jumper.
The seven reasons Chihuahuas shake
1. Cold. By far the most common. Tiles, wet grass, wind, a draughty hallway or the ten minutes after a bath. If warmth stops it within a few minutes, that was the answer.
2. Excitement. The pre-walk quiver, the visitor quiver, the "you're home" quiver. Usually comes with a waggy tail, bright eyes and some dancing on the spot.
3. Fear or stress. Fireworks, thunder, the vet, the car, a busy street, a large dog. Usually comes with a tucked tail, ears back, a low body, lip licking or trying to hide.
4. Anticipation, and learned shaking. Some Chihuahuas discover that a good tremble at the dinner table produces sympathy, which produces toast. It's a performance, and a convincing one.
5. Low blood sugar. Mainly a risk in tiny puppies under about three months old, and in very small or unwell adults who've missed a meal. It can be serious. More on this below.
6. Pain, nausea or illness. Dogs in pain or feeling sick often tremble, especially with tummy upsets, ear problems or sore joints. Usually there's something else too: hunching, panting, drooling, not eating or not wanting to move.
7. Tremor conditions and poisoning. Shaker syndrome, above, and poisoning, including chocolate and the sweetener xylitol. Either way, that's a vet's job.
How cold is too cold for a Chihuahua?
There's no single magic temperature, because coat type, age, health, wind and wet all change it. These are sensible rules of thumb.
Conditions | What most Chihuahuas need |
Mild and dry | Usually fine without a coat on a brisk walk |
Cool, or windy | A jumper for smooth coats, puppies and seniors |
Cold | A jumper or coat for most, and shorter walks |
Wet | A light waterproof coat, and a thorough towel-dry after |
Frosty or icy | A warm coat, short walks, and check paws for ice and grit |
Indoors on tiles | Rugs, a raised or covered bed, and blankets |
A useful test: if you're standing still outside and want your coat zipped up, so does he.
The Chihuahua shiver, decoded
Every owner learns to read the different trembles. Most households end up with the full set.
The post-bath shiver. Theatrical, full-body and timed so that you feel personally responsible. Ends the moment he's dry and back under a blanket.
The doorbell shiver. Rapid, excited and often accompanied by barking. Nothing to do with temperature. Everything to do with the postman.
The dinner-table tremble. Delicate, persistent and aimed directly at whoever is holding food. Stops the instant the plate is empty, which tells you all you need to know.
The vet-scale shiver. Genuine. A small dog on a cold metal plate in a room that smells of other dogs' worries. Be kind, and bring treats.
The dream twitch. Small jerks, paddling paws and muffled woofs during sleep. Dogs dream. He's fine, and almost certainly winning.
The jumper stand-off. A short, pointed tremble at the front door that means "I'm not going out in that without a coat". Alfie's owner, on Purina, names one of the breed's great skills: "refusing walks when raining". Some Chihuahuas consider weather a personal insult.
The waiting room
Month two. His first vaccination booster. In the waiting room he sits on your lap, shaking so hard your knee vibrates. A Labrador across the room wags at him. He shakes harder. The vet nurse offers a treat, which he ignores, and then a second one, which he takes very carefully. On the way home, in his carrier under a blanket, he stops shaking before the end of the road and starts snoring before the end of the next.
Keeping a Chihuahua warm: what actually helps
A jumper that fits. It should cover the back and chest without rubbing under the front legs or squashing the neck. Smooth-coated dogs, puppies and seniors benefit most.
A waterproof coat for wet days. Wet fur loses heat far faster than dry fur. A light, lined, waterproof coat is worth more than a thick jumper in the rain.
Beds he can burrow into. Covered beds, cave beds and a pile of blankets suit a breed that likes to tunnel. Chewy's owner isn't joking about the blankies.
Get him off the floor. A rug over tiles, a raised bed or a spot on the sofa, with steps, keeps him away from the coldest part of the room.
Dry him straight away. After rain, baths or a paddle, towel him thoroughly and keep him somewhere warm until he's completely dry.
Pick the warm part of the day. In winter, walk around midday rather than at dawn, and keep walks shorter and brisker. He'll make his opinion of dawn clear anyway.
Heat pads, with care. Only pet-safe heat pads designed for dogs, with a cover, on a low setting and with space for him to move off. Never leave a human electric blanket on under a dog.
Low blood sugar in Chihuahua puppies
Hypoglycaemia is the reason vets take shaking in tiny puppies seriously. Very young toy-breed puppies, especially under about three months old, haven't fully developed the ability to regulate their blood sugar, and Chihuahuas are among the breeds most at risk (FirstVet).
Signs to know: weakness, unusual sleepiness, wobbliness, trembling, glassy eyes, a head tilt, confusion, seizures or collapse. Signs can be vague, which is why it's worth knowing them in advance.
What to do: if he's alert, offer food straight away and call your vet. If he's floppy, unresponsive or fitting, keep him warm, rub a little glucose syrup on his gums as an emergency measure and go straight to a vet. Never give anything containing xylitol, which is poisonous to dogs.
Prevention: three to four small meals a day for young puppies, on a regular schedule, no long gaps, and prompt vet attention if he's off his food, vomiting or has diarrhoea. Keep him warm, too, because cold and low blood sugar make each other worse.
Helping a nervous shaker
If the trembling is about fear, warmth won't fix it. Confidence will, slowly.
Comfort is allowed. The old advice that comforting a frightened dog "rewards the fear" doesn't hold up: fear is an emotion, not a trick he's performing for attention. Calm, quiet reassurance helps. Panicking with him doesn't.
Give him a den. A covered bed or crate in a quiet corner where nobody, including visitors and children, disturbs him. Somewhere to retreat to is half the battle.
Go at his pace. If big dogs, traffic or strangers set him off, start at a distance where he can watch without trembling, and pair what scares him with treats.
Make the vet a nicer place. Pop in for weigh-ins and treats when nothing is going to happen, use a carrier he's happy to sit in, and ask about quieter appointment times.
Some trembling starts the moment you pick up your keys, which is a different problem with its own plan.
Normal, or worth a vet visit?
Normal: trembling on cold floors or in wind and rain that stops when he's warm; quivering with excitement; shaking at the vet, in the car or during fireworks; a brief shiver after a bath; twitching in his sleep.
Worth a call to your vet today: shaking that doesn't stop when he's warm and calm; shaking with vomiting, diarrhoea, drooling or not eating; shaking with a hunched back, yelping or reluctance to move; a new tremor that's constant or getting worse.
An emergency: shaking with weakness, wobbliness, glassy eyes, confusion, seizures or collapse, or after he may have eaten chocolate, xylitol, medicines or anything else he shouldn't.
What not to do with a shaking Chihuahua
Don't assume it's always cold. A jumper won't fix fear, pain or low blood sugar. Read the rest of the dog.
Don't tell him off for trembling. It's not disobedience, and scolding a frightened dog makes the fear worse.
Don't let strangers scoop him up. A trembling Chihuahua being passed around for cuddles is a dog being overwhelmed. Let him choose who he approaches.
Don't share sweets in an emergency. Many sugar-free products contain xylitol, which is poisonous to dogs. Use plain glucose syrup or honey, and only as first aid on the way to the vet.
Don't overheat him either. Too many layers indoors, or a heat pad he can't move away from, is its own problem. He should be able to choose cool or warm.
A Chihuahua probably isn't the right fit if:
you'd rather not think about jumpers, coats and the temperature of the kitchen floor
you want a dog for long walks in all weathers
a dog who trembles at the vet, the car and fireworks would worry you more than it would amuse you
If you're still weighing it up, the full list of trade-offs is worth a read.
Older Chihuahuas and shaking
Many Chihuahuas live well into their teens, and shaking can change as they age. Older dogs lose muscle, which makes them feel the cold more. Stiff, painful joints often show up first as trembling in the back legs, particularly after getting up. Kidney problems, heart disease and some neurological conditions can also cause tremors or weakness. A senior who's started shaking more than he used to deserves a vet check, not just an extra jumper. What changes with age, and what helps, is covered in the lifespan post.
How to help a shaking Chihuahua
The aim isn't a Chihuahua who never trembles. It's one who's warm, confident and checked when it's something more.
In the moment
Check the obvious first: is he cold, wet, excited or worried?
Warm him up with a blanket or your lap, and get him off cold floors.
If he's frightened, move away from the trigger and stay calm yourself.
If he's weak, wobbly or confused, treat it as an emergency.
Long term
Build a warm home. Rugs over tiles, a covered bed in each room he uses, and a jumper ready by the door from October.
Build a confident dog. Short, positive outings, gentle handling practice and plenty of quiet places to retreat to.
Feed little and often while he's young. Regular small meals keep puppy blood sugar steady.
Keep his vet checks up to date. Many causes of shaking, from pain to dental disease, are easier to spot at a routine check than at 2am.
The first frost
Month ten. The first frosty morning of winter. You put his jumper on at the door, then his coat over the top, and he stands still for both, which is new. Out on the pavement he trots briskly, ears up, not a tremble in sight. Back home, he heads straight for his blanket and arranges it into a nest. He looks extremely pleased with the system you've built together.
Do Chihuahuas shake more than other breeds?
Compared with most breeds, yes. They're one of the smallest breeds there is, and size is the biggest factor in how quickly a dog gets cold. Other small, thin-coated breeds such as Italian Greyhounds, Miniature Pinschers and toy terriers shake for similar reasons. A Labrador, with his dense double coat and thirty-odd kilos, barely notices a cold floor. A Chihuahua notices it from across the room.
What Chihuahua owners realise over time
Most owners stop panicking about the shaking and start reading it. Cold, excitement, nerves or something more: once you know the difference, it's easy to help. And the trembling becomes part of the character. A Chihuahua who shakes with joy when you come home is not a dog with a problem. He's a dog with a lot of feelings and not much body to keep them in. The same small dog who trembles at the door will follow you round the house all evening, which is a whole other post.
The kitchen tiles, a year on
A year after that first trembling dinner on the tiles. There's a rug in the kitchen now, a bed by the radiator and a jumper on a hook by the door. He finishes his dinner, walks straight past the tiles, climbs into his bed and pulls the blanket over his own head. Not a shiver in sight. You've been trained very well.
The verdict
Why do Chihuahuas shake? Mostly because they get cold quickly, and because excitement and nerves show up in their whole body. Usually it's normal and easily helped with warmth, calm and a little patience. Know the exceptions: low blood sugar in puppies, pain, illness, poisoning and tremor conditions. Shaking that doesn't stop, or comes with weakness or a dog who isn't himself, is a reason to call the vet.
If you're still getting to know the breed, the guide covers the full picture.
Living with a Chihuahua means owning more blankets than you ever thought a household could need. The Chihuahua range is for people who've stopped counting.
👉 Explore Chihuahua women's t-shirts, unisex t-shirts and sweatshirts and hoodies
👉 or explore the full CHIHUAHUA COLLECTION
Got a Chihuahua who owns every blanket in 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
Why do Chihuahuas shake?
Mostly because they get cold quickly. Excitement, nerves and anticipation are also common causes. Less often, shaking can be a sign of low blood sugar, pain or illness.
Why do Chihuahuas shake so much?
They're tiny, with little body fat and lots of surface area for their size, so they lose heat fast. They're also alert, excitable dogs whose feelings show in their whole body.
Is it normal for a Chihuahua to shake?
Yes, in most cases. Brief shaking from cold, excitement or nerves is normal. Constant shaking, or shaking with other signs of illness, isn't.
Why is my Chihuahua shaking and acting weird?
Shaking with weakness, wobbliness, vomiting, confusion or hiding can mean pain, illness, low blood sugar or poisoning. Call your vet straight away.
Do Chihuahuas get cold easily?
Yes. Vets note that small breeds like Chihuahuas feel the cold quickly. Smooth-coated dogs, puppies and seniors feel it most.
Do Chihuahuas need jumpers?
Many do in cold, wet or windy weather, especially smooth coats, puppies and older dogs. Make sure it fits without rubbing.
Why does my Chihuahua shake when I eat?
Often it's anticipation, and sometimes a learned request that has paid off before. Don't reward it, and reward calm instead.
Why does my Chihuahua shake at the vet?
Most dogs find the vet stressful. In one study, 78.5% of dogs were fearful on the examination table. Calm handling, treats and happy visits help.
Can low blood sugar make a Chihuahua shake?
Yes, particularly young puppies. Signs include trembling, weakness, sleepiness and wobbliness. It can be serious, so contact your vet promptly.
What is shaker syndrome in dogs?
A tremor condition seen mostly in small dogs, usually starting at one to two years old. It's treatable, and most dogs do very well.
Why does my Chihuahua shake in his sleep?
Small twitches and paddling during sleep are usually dreaming. If he's hard to wake or seems confused afterwards, ask your vet.
Why has my older Chihuahua started shaking?
Muscle loss, pain from stiff joints and illnesses such as kidney or heart disease can all cause it. A new tremor in a senior is worth a vet check.
Comments