Causes of Dog Tremors and Assessing Urgency

Brain & CognitionSymptomsMeongsiljang Veterinary Advisory Board

Dogs may tremble for a variety of reasons, ranging from normal responses like cold or excitement to serious conditions such as poisoning or seizures. We’ve outlined the criteria for assessing urgency and key points to check at home.

What Is Dog Shivering?

The guardian observing the trembling puppy

Shivering in dogs is a symptom caused by rapid, repetitive muscle contractions in the entire body or specific areas. The most important thing is to identify the underlying cause. If the shivering stops within a few minutes due to cold or excitement, it’s usually not a concern. However, if it’s accompanied by decreased consciousness, muscle rigidity, or vomiting, or lasts longer than 30 minutes, it could be an emergency. First, check the surrounding temperature, what your dog has eaten recently, and which part of the body is shivering.

Urgency Levels by Tremor Intensity

Tremors can be categorized into four stages based on their intensity and accompanying symptoms. While mild shivering can be monitored at home, you should seek immediate veterinary care if your pet shows changes in consciousness or muscle rigidity. Use the table below to assess which stage your pet’s condition falls into.

Four Stages of Tremor Urgency

Item	Stage 1 (Normal)	Stage 2 (Observation)	Stage 3 (Clinic)	Stage 4 (Emergency)
Trembling Pattern	Brief body shivering	Repeated in a specific area	Persistent whole-body trembling	Accompanied by rigidity or seizures
Consciousness	Clear	Clear	Slightly clouded	Unresponsive/dazed
Duration	Within 1–2 minutes	Recurs within 10 minutes	30 minutes or more	Recurs frequently
Response	Keep warm & calm	Observe for 24 hours	Same-day care	Immediate emergency room

If trembling does not stop for more than 5 minutes or consciousness becomes clouded, treat it as Stage 4

Seven Signs to Check at Home

To narrow down the cause of the tremors, quickly check the items below. Your observations at home are extremely helpful for diagnosis at the clinic as well.

Body temperature: Normal range is 38–39.2°C; deviations may indicate an underlying cause.

Location of tremors: Whether it affects the entire body or specific areas such as the hind legs or head.

Triggering circumstances: Timing, such as after meals, after exercise, or just before falling asleep.

Time since last meal: How many hours have passed since the last feeding.

Recent ingestion: Whether the pet has consumed chocolate, xylitol, human medications, or houseplants.

Level of consciousness: Whether the pet responds when called by name.

Accompanying symptoms: Vomiting, drooling, difficulty standing, or head tilting.

When to Go to the Emergency Room Immediately

If any of the following apply, do not search for information online; take your pet to a 24-hour veterinary clinic immediately. - Tremors lasting more than five minutes - Disorientation or collapse accompanied by tremors - Foaming at the mouth, blue gums, or difficulty breathing - Suspected ingestion of chocolate, xylitol, or human medications - Eyes deviated to one side or head tilting - A small-breed dog trembling weakly on an empty stomach in the morning, followed by decreased consciousness In particular, young small-breed dogs (such as Chihuahuas, Yorkies, and Maltese) can experience rapidly progressing hypoglycemic seizures.

Seven Main Causes of Tremors

Veterinary internal medicine textbooks generally categorize the causes of trembling in dogs into the following seven groups:

Cold and hypothermia: Common in small breeds, short-haired breeds, and senior dogs.

Nervousness or excitement: Triggered by unfamiliar environments, vet visits, or loud noises like thunder and fireworks.

Pain: Abdominal pain, joint pain, or spinal conditions—often indicated by reluctance to be touched on the back or belly.

Hypoglycemia: Occurs in young small-breed dogs after prolonged fasting, resulting in weak, lethargic trembling.

Toxicity: Ingestion of chocolate, xylitol, coffee, grapes, or human medications.

Neurological disorders: Including cerebellar tremors and corticosteroid-responsive tremor syndrome.

Age-related tremors: Mild trembling seen in senior dogs, particularly elderly small breeds.

An image showing the various causes of trembling in puppies

How to Manage at Home by Cause

If the cause is clear and your pet is fully conscious, you can manage the situation at home.

Cold: Wrap them in a blanket and keep the room temperature between 22–24°C.

Stress: Move them to a quiet, dimly lit area; avoid forcing them into your arms.

Suspected Hypoglycemia: Apply a small amount of honey or sugar water to their gums, then head to the clinic.

Hunger: Offer a small amount of their regular food and monitor their response.

Age-Related Tremors: Keep their joints warm and place mats on slippery floors.

However, if poisoning is suspected or your pet becomes disoriented, do not attempt home care—seek immediate veterinary attention.

Additional Precautions by Breed and Age

Certain breeds and age groups are more prone to trembling, with some having well-defined underlying causes. - Toy breeds such as Chihuahuas, Yorkies, and Maltese: These dogs are sensitive to cold and may tremble easily in chilly environments, making proper warmth management essential. - Small toy breeds: They are prone to corticosteroid-responsive tremor syndrome (formerly known as white hairy shaker syndrome). This condition is characterized by sudden-onset whole-body tremors and vestibular (balance) dysfunction, with symptoms often worsening during excitement or stress. - Boxers, English Bulldogs, and Dobermans: These breeds are predisposed to idiopathic head tremor, which presents as sudden, repetitive up-and-down (nodding) head movements. If this occurs without other neurological signs, a neurological evaluation is recommended. - Senior dogs, especially small breeds: Age-related tremors may develop, and diagnostic testing can help rule out other potential causes. - Puppies under 4 months old: Trembling can stem from various causes. If tremors persist or are accompanied by lethargy, prompt veterinary care is necessary.

Prevention and Daily Care Tips

With proper daily care, you can significantly reduce the frequency of tremors.

Feeding schedule: Small breeds should be fed three to four times a day in divided meals.

Indoor temperature: Maintain at least 22°C during winter, and dress your dog in clothing when going outside.

Toxic substance management: Keep chocolate, xylitol, grapes, and human medications out of reach.

Stress reduction: Provide a quiet room with curtains drawn during thunderstorms or fireworks.

Health checkups: Annual to biannual neurological and endocrine exams are recommended for dogs aged seven and older.

Recording videos of the tremors on your smartphone can greatly assist with diagnosis during veterinary visits.

A dog resting comfortably in a warm and safe environment

Reviewed by a veterinarian

Dr. Tony — Punnawat Phongkittirak

Veterinarian

A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.

Frequently Asked Questions

My puppy twitches while sleeping. Is that normal?

It’s normal for your pet to twitch lightly while dreaming. If you notice their eyes moving or their paws and lips flickering, it’s just a REM sleep response. However, if they don’t wake up when called or their entire body becomes rigid, it could be a seizure. In that case, record a video and bring them in for a veterinary examination.

Only the hind legs are dragging. What could be the cause?

Trembling in the hind legs is likely due to joint pain, patellar luxation, intervertebral disc disease, or age-related muscle weakness. If your pet avoids stairs or has difficulty sitting comfortably, a consultation with an orthopedic or neurology specialist is recommended.

If my pet trembles when excited, do I really need to visit the vet?

Tremors can worsen during times of excitement or stress. If the shaking persists after the triggering situation has ended or occurs frequently, it may indicate an underlying issue, so we recommend having your pet examined.

My dog ate a small amount of chocolate. Is this an emergency?

Yes, you need to take your pet to an emergency veterinary clinic immediately. The toxic components in chocolate vary in their risk of causing poisoning depending on the type of chocolate and the amount ingested relative to your pet's body weight, so even small amounts require a veterinarian's assessment. Write down when and how much was consumed, as this information will help the veterinarian quickly determine the appropriate detoxification measures.

My senior dog has a slight limp even on normal days. Does it need treatment?

Mild tremors in older dogs, especially small-breed seniors, can be caused by age-related decline in muscle strength and nerve function. If daily activities are unaffected, focus on keeping them warm and supporting joint health. However, if the tremors are new or worsening, a veterinary check-up is recommended.