Why Is Your Dog Trembling? Vets Reveal 7 Surprising Reasons Behind the Shakes

A trembling dog can be a worrying sight for any pet owner. Is it cold? Scared? Sick? According to a recent report by Russian veterinarians, canine trembling may have a wide range of explanations — from completely normal behavior to serious medical red flags.

Understanding the context, duration, and accompanying symptoms is key to knowing when your dog just needs a blanket — and when it needs a vet.

1. Cold Temperatures

Just like humans, dogs can shiver when they’re cold — especially small breeds, short-haired dogs, or elderly pets. Trembling in chilly weather or after a bath is a normal thermoregulatory response.

Solution: Warm up your dog with a blanket, sweater, or by bringing them inside. If the shivering stops once warm, it’s nothing to worry about.

2. Excitement or Anticipation

Some dogs tremble when they’re excited — whether they’re about to go on a walk, get a treat, or see a familiar person. This type of shaking is typically short-lived and stops once the moment passes.

It’s common in high-energy or anxious breeds like Chihuahuas and Jack Russells, and not usually a cause for concern.

3. Stress, Anxiety, or Fear

Loud noises (like thunderstorms or fireworks), new environments, or separation can cause stress-related trembling. Look for accompanying signs like tucked tails, pacing, or panting.

Creating a calm space, using soothing tones, or applying pressure garments (like Thundershirts) can help ease the anxiety. In severe cases, consult a vet for behavioral strategies or calming supplements.

4. Pain or Injury

If trembling is sudden and your dog is also whimpering, reluctant to move, or showing posture changes, pain may be the cause. Joint issues, muscle strains, or internal problems can trigger shaking.

Do not try to handle the dog aggressively — pain may trigger defensive reactions. Seek veterinary attention promptly for a proper diagnosis.

5. Poisoning or Toxic Reaction

Shaking can be an early sign of poisoning. This may come from ingesting chocolate, xylitol (found in sugar-free gum), antifreeze, or toxic plants. Other signs may include vomiting, drooling, or disorientation.

This is a medical emergency. If you suspect poisoning, go to a vet or animal emergency clinic immediately.

6. Neurological Disorders

Certain conditions, like epilepsy, distemper, or nervous system degeneration, can cause tremors or spasms. These are often more rhythmic and less related to external stimuli.

Only a veterinarian can confirm a neurological cause, often with imaging or blood tests. Treatments vary widely depending on the underlying condition.

7. Age-Related Tremors

Older dogs, particularly large breeds, may develop tremors as part of the aging process. These are typically localized to the legs or head and not necessarily painful.

While not curable, they can be managed through lifestyle adjustments and comfort measures. Rule out other causes before attributing the trembling solely to age.

When to Worry

If your dog’s trembling is:

• Accompanied by vomiting, diarrhea, or lethargy
• Sudden and intense
• Paired with signs of pain or distress
• Recurring without an obvious cause

…it’s time to consult a veterinarian. Better safe than sorry when it comes to unexplained behavior.

Final Thought

Dogs can’t tell us what’s wrong — but their bodies often do. Whether the cause is harmless excitement or a serious medical issue, shaking is your dog’s way of communicating that something has changed.

And as any good owner knows, listening to those small signals is one of the biggest parts of love.