Why Does My Dog Shake and Tremble? Causes and When to Worry

By Tailwisp Editorial TeamUpdated October 17, 20263 min read

Trembling is a symptom, not a diagnosis, and its causes range from harmless to urgent.

Everyday causes

• Cold: especially small, thin-coated and older dogs.
• Excitement: anticipating a walk or play.
• Fear and anxiety: storms, vet visits, strangers. See dog stress signals checklist.
• Post-activity muscle fatigue.
• Old age: muscle weakness and tremors in some seniors.

Pain and illness

Trembling may indicate:

• Pain, such as from arthritis, injury or back problems
• Nausea or digestive upset
• Fever or infection
• Low blood sugar, especially in toy breeds and puppies
• Kidney or liver disease
• Hormonal conditions
• Neurological disease

If trembling is persistent, or comes with other symptoms, see your vet.

Toxins

Tremors can follow ingestion of toxins, such as certain foods, plants, medications, insecticides or chemicals. If you suspect poisoning, call your vet or an animal poison hotline immediately. See is xylitol toxic to dogs.

Shaker syndrome and other tremor disorders

Some dogs, particularly small white breeds, can develop a generalized tremor syndrome that a vet can diagnose and treat. Do not self-diagnose.

Seizures versus tremors

A tremor is usually rhythmic shaking while the dog is aware. A seizure often involves loss of awareness, stiffness, paddling, drooling or collapse. If you suspect a seizure, keep your dog safe, note the time and call your vet.

Red flags for urgent care

• Sudden, severe tremors
• Collapse or inability to stand
• Vomiting or diarrhea with trembling
• Possible toxin exposure
• Pale gums or labored breathing
• Trembling in a puppy or toy breed that seems weak

What to do

1. Warm him up if cold.
2. Remove stressors if fearful.
3. Check for pain: gentle observation, no forceful handling.
4. Record a video.
5. Call your vet if it persists or you are worried.

Behavior and tremors

Dogs may also shake as part of stress release. See why do dogs shake after nothing and why does my dog pant when not hot.

Prevention

• Keep dogs warm in cold weather.
• Feed regular meals, especially to small breeds.
• Keep toxins out of reach.
• Maintain regular vet check-ups.

Common mistakes

• Assuming it is only cold.
• Waiting too long.
• Giving human medication.
• Ignoring other symptoms.

Troubleshooting

• My dog shakes in the vet's office: probably fear. Use calming approaches.
• My dog shakes at night: check temperature, pain and anxiety.
• My senior shakes when standing: weakness or pain, so see your vet.

A simple plan

1. Observe the context.
2. Check temperature and surroundings.
3. Note other signs.
4. Contact your vet if concerned.

Real-life examples

A chihuahua trembles on a winter walk and settles with a sweater. A terrier shakes after eating something in the yard, and an emergency vet treats poisoning. A senior dog shakes in his hind legs, and a vet finds arthritis. Context matters.

Keeping a record

Write down when trembling occurs, how long it lasts and what else you noticed. A short video is more helpful than a description. Records help vets find patterns and decide on tests or treatment, which gets your dog the right help sooner.

Trembling in puppies and small breeds

Puppies and toy breeds lose heat quickly and can develop low blood sugar when they skip meals. If a small dog shakes, is lethargic or wobbly, call your vet immediately. Keep these dogs warm, feed regular meals and ask your vet what to do if they seem weak.

Trembling after vaccinations or procedures

Mild trembling can follow vet visits, from stress or minor soreness. If it lasts more than a day, or comes with swelling, vomiting or hives, call your vet. Mention any recent medication or treatments when you describe the problem.

The takeaway

Trembling can be harmless or serious. Watch for other signs, and call your vet when in doubt.