🥶 Dog Health Guide

Why Is My Dog Shaking? Causes From Cold to Seizures

Updated April 202610 min readVet-reviewed sources

Dogs shake for many reasons — some harmless, some life-threatening. A Chihuahua shivering on a cool evening is normal. A Labrador trembling uncontrollably with a rigid body is a seizure. The key is context: what else is happening, how long has it lasted, and has your dog been exposed to anything toxic?

Is This an Emergency?

Brief shivering from cold or excitement is normal. Uncontrollable trembling, tremors with rigidity, or shaking after eating something suspicious is an emergency.

EMERGENCY — Go to the vet NOW

Trembling + rigid body or paddling legs (seizure)
Shaking after known toxin exposure (chocolate, xylitol, snail bait, marijuana)
Trembling + collapse or inability to stand
Shaking + pale or blue gums
Shaking + vomiting + diarrhea simultaneously

URGENT — Call your vet today

Persistent shaking for more than 30 minutes without obvious cause
Shaking + lethargy or hiding
Shaking + limping or crying in pain
Trembling + fever (rectal temp above 103°F/39.4°C)
New onset shaking in a senior dog

MONITOR — Watch for 24-48 hours

Brief shivering when cold — stops with warmth
Shaking during thunderstorms or fireworks (anxiety)
Trembling at the vet office (fear)
Shaking with excitement (greeting, mealtime)

USUALLY NORMAL — Low concern

Shaking off water after a bath
Brief whole-body shake after waking up
Small breed shivering in cool weather

Common Causes of Dog Shaking & Trembling

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Cold

Very common

Small and thin-coated breeds shiver to generate heat — Chihuahuas, Greyhounds, Whippets, Italian Greyhounds. Normal when resolved by warmth. Not an issue for thick-coated breeds in moderate temperatures.

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Fear or anxiety

Very common

Thunderstorms, fireworks, vet visits, car rides, loud noises. Accompanied by panting, hiding, clingy behavior. Usually temporary and resolves when the trigger passes.

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Excitement

Very common

Some dogs tremble with excitement during greetings, mealtimes, or before walks. More common in small and high-energy breeds. Not harmful — just enthusiasm.

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Pain

Common

Dogs shake when in pain — abdominal pain, joint pain, back pain, ear infections. Often subtle — the only sign may be trembling combined with reluctance to move. Requires vet evaluation to find the source.

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Toxin ingestion

Moderate

Chocolate, xylitol, snail bait (metaldehyde), marijuana, mycotoxins (from moldy food/compost), and many household chemicals cause trembling or seizures. This is an EMERGENCY — contact ASPCA Poison Control (888-426-4435).

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Generalized Tremor Syndrome (GTS)

Uncommon

Also called 'white shaker syndrome' — an autoimmune condition causing whole-body tremors. Most common in small white breeds (Maltese, West Highland White Terrier) but can affect any breed. Treatable with corticosteroids.

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Seizure disorder (epilepsy)

Moderate

Seizures cause involuntary muscle contractions — paddling legs, rigid body, loss of consciousness, drooling, sometimes loss of bladder/bowel control. Can last seconds to minutes. Idiopathic epilepsy is common in German Shepherds, Beagles, and Golden Retrievers.

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Distemper

Uncommon (vaccinated dogs)

A serious viral infection causing tremors, fever, nasal discharge, coughing, and neurological symptoms. Preventable by vaccination. Most common in unvaccinated puppies. Often fatal without treatment.

Breed-Specific Risks

Cold sensitivity

Chihuahua, Italian Greyhound, Whippet, Greyhound

Thin-coated and small breeds shiver easily in cool temperatures. This is normal thermoregulation, not illness. Provide sweaters in cold weather. Becomes a concern only if shaking persists in warm environments.

Generalized Tremor Syndrome

Maltese, West Highland White Terrier, Bichon Frise

Small white breeds are predisposed to GTS (white shaker syndrome). Whole-body tremors that worsen with handling. Treatable with corticosteroids — most dogs improve within a week of starting treatment.

Idiopathic epilepsy

German Shepherd, Beagle, Golden Retriever, Labrador

These breeds have higher rates of epilepsy. Seizures typically begin between 1-5 years of age. Managed with daily anti-seizure medication (phenobarbital, levetiracetam). Lifelong condition requiring regular blood work.

Wobbler Syndrome

Doberman Pinscher

Cervical vertebral instability causes trembling, wobbling gait, and neck pain. More common in large breeds, especially Dobermans and Great Danes. Diagnosed with MRI. Treatment ranges from medical management to surgery ($5,000-10,000).

What to Do at Home

Identify the trigger

Is your dog cold? Anxious? Excited? In pain? Context determines whether home care is appropriate or you need a vet. If no obvious trigger exists, a vet visit is warranted.

Warm a cold dog

Bring small or thin-coated dogs inside, wrap in a blanket, or use a sweater. If shaking stops with warmth, cold was the cause. If shaking continues in a warm environment, it's not cold-related.

For anxiety — provide a safe space

During storms or fireworks: close curtains, play white noise, offer a den-like space (covered crate with blankets). Thundershirts (compression wraps) help some dogs. For chronic anxiety, discuss medication with your vet.

During a seizure — don't restrain

Time the seizure (video if possible). Move objects away from your dog. Do NOT put anything in their mouth. Most seizures last under 2 minutes. If it lasts over 5 minutes, this is status epilepticus — a life-threatening emergency. Call the emergency vet immediately.

If toxin exposure is suspected — act fast

Call ASPCA Poison Control (888-426-4435) or your vet immediately. Note what your dog ate, how much, and when. Do NOT induce vomiting unless specifically instructed by a professional.

What to Tell Your Vet

Before calling or visiting the vet, gather this information — it helps them diagnose faster:

When the shaking started

Whether it's constant or intermittent

Any known exposure to toxins, garbage, or medications

Other symptoms (vomiting, lethargy, limping, loss of consciousness)

Whether your dog has had seizures before

Any recent changes in environment or routine

Your dog's vaccination status (distemper)

Temperature if you can check it (normal: 101-102.5°F)

Video of the shaking episode — extremely helpful for your vet

Treatment Costs

Treatment	Estimated Cost	Details
office Visit	$50-100	Standard examination
bloodwork	$100-300	CBC, chemistry panel, toxicology if suspected
neurological Exam	$200-500	Specialized neurological assessment
mri	$1,500-3,500	Brain/spinal MRI for seizure disorders or structural issues
anti Seizure Meds	$30-100/month	Phenobarbital or levetiracetam — ongoing
toxin Treatment	$500-3,000	Decontamination, IV fluids, monitoring for poisoning
emergency Visit	$500-2,000	After-hours emergency exam + diagnostics

How pet insurance helps: Most pet insurance plans reimburse 70-90% of covered veterinary costs after your deductible. For a $3,000 emergency surgery with 80% reimbursement and a $250 deductible, you'd pay $800 instead of $3,000. See what coverage costs for your dog →

Prevention

Keep vaccinations current — especially distemper (DHPP)

Store toxins securely — chocolate, xylitol, medications, cleaning products, snail bait

Provide sweaters for small/thin-coated breeds in cold weather

Use calming aids during storms/fireworks if your dog has anxiety

Regular exercise reduces anxiety-related shaking

If your dog has epilepsy, give anti-seizure medication consistently — never skip doses

Puppy-proof your home to prevent toxin access

Keep compost bins secured — moldy food produces tremorgenic mycotoxins

Frequently Asked Questions

There's always a reason — you just might not see it. Pain is the most overlooked cause: dogs shake when something hurts internally (abdominal pain, back pain, ear infection) without showing obvious external signs. If your dog is shaking without an obvious trigger (cold, anxiety, excitement) and it persists for more than 30 minutes, see your vet.

Yes — shaking is one of the most common subtle signs of pain in dogs. Unlike humans, dogs rarely cry out in pain. Instead, they tremble, become quiet, hide, or stop eating. If your dog is shaking and also reluctant to move, skipping meals, or holding a body part differently, pain is the likely cause.

Emergency situations: shaking with rigid body or paddling legs (seizure), shaking after eating something toxic, shaking with collapse, shaking with pale or blue gums, or seizures lasting more than 5 minutes (status epilepticus). Also urgent: persistent shaking for 30+ minutes with no obvious cause, or shaking with fever.

Small breeds (Chihuahuas, Yorkies, Maltese) shake more frequently due to: higher surface-area-to-mass ratio (they lose heat faster), higher metabolic rate (burns energy faster), and heightened anxiety response. Some degree of shaking is normal for these breeds. However, if shaking is new, worsening, or accompanied by other symptoms, see your vet.

Yes — anxiety is one of the most common causes. Thunderstorms, fireworks, vet visits, car rides, separation, and loud noises trigger shaking, panting, hiding, and clingy behavior. For occasional events, Thundershirts and safe spaces help. For chronic anxiety, your vet may prescribe trazodone, gabapentin, or fluoxetine.

During a seizure, dogs typically fall to their side, become rigid, and paddle their legs involuntarily. They may drool, urinate, or defecate. Eyes may be wide open or rolled back. They're unconscious and can't hear you. Most seizures last 30 seconds to 2 minutes. After a seizure (post-ictal phase), dogs are confused, wobbly, and may be temporarily blind for minutes to hours.

Basic workup (exam + blood work): $150-400. If neurological causes are suspected: neurological exam ($200-500) plus MRI ($1,500-3,500). Ongoing epilepsy medication: $30-100/month plus regular blood work ($100-200 every 6 months). Toxin treatment: $500-3,000 depending on the substance. Pet insurance covers diagnostics and treatment — 70-90% after deductible.

Sources

Merck Veterinary Manual — Tremors and Seizures in Dogs — differential diagnosis (2023)

ASPCA Animal Poison Control — Toxins causing tremors in dogs — metaldehyde, mycotoxins, theobromine (2024)

Journal of Veterinary Internal Medicine — Idiopathic epilepsy in dogs — breed predisposition and management (2021)

VCA Animal Hospitals — Generalized Tremor Syndrome — Dr. Tammy Hunter, DVM (2023)

PetMD — Why Is My Dog Shaking? — reviewed by veterinary neurologist (2023)

Unexpected vet bills add up fast

A single emergency visit can cost $500-$7,000+. Pet insurance covers diagnostics, treatment, surgery, and hospitalization — so you can focus on your dog's health, not the bill.

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