Dog Shaking: 8 Causes and When to Call the Vet
Written and checked with AI using the references below. This is not human expert review.
Quick answer
Dogs shake for many reasons, from drying off and excitement to pain, toxin ingestion, low blood sugar, or seizures, so the cause determines the urgency. Shaking from excitement or a wet coat is harmless. Shaking paired with vomiting, collapse, or possible toxin exposure is an emergency. The cause tells you whether to relax, schedule a vet visit, or call right now.
When Shaking Is Completely Normal
The most obvious case is a wet dog. A dog can shake off roughly 70 percent of the water on its fur in about four seconds, which is far more efficient than towel drying. That full-body shimmy is a built-in feature, not a problem.
Excitement is another harmless trigger. A dog waiting at the door, watching for a family member, or anticipating a walk may tremble visibly. This shaking stops as soon as the dog gets what it is waiting for. No action is needed beyond enjoying the moment.
Stress-related shaking is also common and usually self-limiting. A whole-body shake after a vet exam or an encounter with a stranger is a way dogs release tension, similar to how people take a deep breath. If the shaking stops once the stressful situation ends, it is not a medical concern.
Shaking as a Signal of Pain or Nausea
Shaking that has no obvious trigger, such as a bath or a burst of excitement, deserves closer attention. Certain toy breeds and small terrier breeds shiver more than others, and that shivering can be a sign of pain. Nausea can also cause a dog to shake. If you cannot identify a clear, harmless reason for the shaking, the AKC’s chief veterinary officer recommends contacting your veterinarian to rule out a more serious issue.
The practical check: ask yourself whether anything changed recently. A new activity, a fall, a change in gait, or reduced appetite alongside the shaking all point toward a vet visit rather than a wait-and-see approach. For guidance on reading other physical signals in pets, the article on recognizing pain signs through face and body posture offers useful context on how animals communicate discomfort.
Low Blood Sugar and Small or Young Dogs
Hypoglycemia (low blood sugar) is a real cause of shaking, and it hits some dogs harder than others. Toy breeds, small breeds, and young puppies are the most susceptible. The body’s drop in blood glucose can trigger visible trembling.
Keeping a dog on a well-balanced diet and feeding on a consistent schedule helps reduce the risk. If shaking episodes happen repeatedly, especially between meals or after exercise, that pattern warrants a veterinary evaluation. Hypoglycemia can sometimes signal an underlying condition that needs diagnosis and treatment, not just a feeding adjustment. For a practical look at portion planning and feeding schedules, see how to calculate and adjust how much to feed your dog.
Head Shaking and Ear Infections
When the shaking is mostly in the head rather than the whole body, an ear infection is a common culprit. All dog breeds can develop ear infections, but Cocker Spaniels, Basset Hounds, Labrador Retrievers, and Golden Retrievers are among the breeds more prone to them. A recent bath or swim followed by persistent head shaking is a classic pattern.
Check the ears gently: redness, swelling, a dark discharge, or an unusual smell all suggest infection. Repeated head shaking can also cause an ear hematoma, where blood pools in the ear flap, which is painful and needs veterinary care. Always dry your dog’s ears thoroughly after water exposure. If the shaking continues or the ears look or smell abnormal, call your vet.
Generalized Tremor Syndrome: Full-Body Shaking With No Clear Cause
Generalized Tremor Syndrome (GTS), also called white dog shaker syndrome or corticosteroid-responsive tremor syndrome, causes full-body tremors. It was first identified in small white dogs, but it has since been seen in dogs of all sizes and coat colors, so no dog is automatically excluded.
The cause is unknown. One theory points to an immune-mediated process affecting neurotransmitters in the brain. Onset typically happens between one and two years of age, and stress tends to make symptoms worse. A veterinarian usually treats GTS with corticosteroids. Symptoms often improve within a week of starting treatment, though some dogs need lifelong management.
If your young adult dog develops sudden full-body tremors without an obvious trigger, GTS belongs on the list of possibilities your vet will consider.
Age-Related Shaking in Senior Dogs
Older dogs sometimes develop tremors, particularly in the hind legs, as they lose muscle mass over time. This is different from the whole-body shaking of GTS or the brief shiver of excitement. It tends to be a gradual change rather than a sudden one.
A senior dog that shakes after physical exertion or cold exposure may also have a reduced ability to regulate body temperature. Warming the dog with blankets and limiting exposure to cold can help in those situations. That said, new or worsening tremors in a senior dog always deserve a veterinary check, since pain, neurological changes, and other age-related conditions can all contribute.
Canine Distemper and Unvaccinated Dogs
Canine distemper is a contagious virus that can cause shaking and trembling. Unvaccinated dogs and puppies carry the highest risk. There is no cure; the virus must run its course, and an infected dog should be kept away from other dogs to prevent spread. A veterinarian manages symptoms and may use antibiotics to prevent secondary infections while keeping the dog hydrated.
The straightforward prevention is keeping vaccinations current. If your dog is unvaccinated and develops shaking alongside other signs of illness, contact your vet promptly.
Stop Signs: When to Act Immediately
Some causes of shaking require a call to your vet or an emergency animal hospital right now, not tomorrow.
| What you observe | What to do |
|---|---|
| Wet coat, shaking to dry off | Normal. No action needed. |
| Trembling from excitement that stops when the trigger is met | Normal. No action needed. |
| Brief shake after a stressful event (vet visit, stranger) | Normal stress release. Monitor. |
| Shaking with no clear cause, especially in a small or toy breed | Schedule a vet visit. |
| Head shaking with red, smelly, or dirty ears | Schedule a vet visit soon. |
| Hind-leg tremors in a senior dog, gradual onset | Schedule a vet visit. |
| Full-body tremors in a young adult dog, sudden onset | Schedule a vet visit promptly. |
| Shaking with vomiting, diarrhea, or collapse | Call your vet or emergency clinic now. |
| Possible ingestion of chocolate, xylitol, or cigarette butts | Call your vet or Pet Poison Helpline immediately. |
| Uncontrollable shaking with jerking, muscle contractions, or loss of consciousness | Call your vet or emergency clinic immediately. |
Toxin Ingestion Is Always an Emergency
Chocolate, cigarette butts, and products containing xylitol (such as sugar-free gum) are toxic to dogs and can cause trembling, seizures, vomiting, diarrhea, and can be fatal. If you have any reason to think your dog got into one of these, do not wait for symptoms to worsen. Call your veterinarian or the Pet Poison Helpline right away.
Seizures Look Like Shaking but Have Extra Signs
A seizure can appear as uncontrollable shaking lasting several minutes, but it also involves muscle contractions, jerking movements, collapse, and brief loss of consciousness. The most common cause in dogs is idiopathic epilepsy. If you suspect your dog had a seizure, notify your vet even if the dog seems to recover quickly. Seizures need a diagnosis and, in many cases, ongoing treatment.
Frequently asked questions
Can a dog shake from being cold, and how do I warm them up safely?
Yes. Dogs, especially small breeds and seniors, can shiver when cold because their bodies struggle to maintain temperature. Move the dog to a warm indoor space and use blankets to help them warm up gradually. If shaking continues indoors or the dog seems lethargic or unresponsive, contact your vet, as prolonged cold exposure can become a medical issue.
My small-breed puppy shakes after skipping a meal. Is that low blood sugar?
It could be. Toy breeds and young puppies are the most susceptible to hypoglycemia, and shaking is one of its signs. Feed your puppy on a consistent schedule with a well-balanced diet. If shaking episodes happen repeatedly around mealtimes or after activity, have your vet evaluate the puppy to rule out an underlying condition.
How do I tell the difference between a seizure and excited trembling?
Excited trembling stops as soon as the dog gets what it wants, and the dog stays aware and responsive. A seizure involves uncontrollable shaking that the dog cannot stop, often with muscle jerking, collapse, or a brief loss of consciousness. If you are unsure, treat it as a possible seizure and contact your vet.
Which dog breeds are most prone to Generalized Tremor Syndrome?
GTS was first identified in small white dogs such as West Highland White Terriers, Maltese, Bichons, and Poodles. However, it has since been seen in dogs of all sizes and colors, so breed alone does not rule it out. Onset is typically between one and two years of age, and stress tends to make symptoms worse.
Should I dry my dog's ears after every bath to prevent ear infections?
Yes. Moisture left in the ear canal after a bath or swim creates conditions where infections can develop. Gently dry the outer ear with a soft cloth after water exposure. Breeds like Cocker Spaniels, Basset Hounds, Labs, and Golden Retrievers are especially prone to ear infections, so ear care after water activities is particularly important for them.
Sources
- Why Is My Dog Shaking? Causes & Solutions · American Kennel Club (akc.org)
- White dog shaker syndrome - Wikipedia · en.wikipedia.org
- Tremor - Wikipedia · en.wikipedia.org
Written by AI; checked through automated evidence and editorial review. References retrieved October 11, 2026.
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