Does Your Dog Have Generalized Tremor Syndrome?
Scary to watch but very treatable. Here's what generalized tremor syndrome is and how most dogs respond to treatment.
- What is generalized tremor syndrome in dogs?
- What does shaker syndrome look like?
- Is it shaker syndrome, a toxin, or a seizure?
- How do vets diagnose generalized tremor syndrome?
- How is generalized tremor syndrome treated?
- Does pet insurance cover generalized tremor syndrome?
- Before we go
- Frequently Asked Questions
If your small dog suddenly started shaking all over and you’ve landed here at midnight frantically searching “shaker syndrome” or “why is my dog trembling,” take a breath. What you’re likely reading about is generalized tremor syndrome (GTS), sometimes called shaker syndrome or idiopathic generalized tremor syndrome. It’s scary to watch, but it’s also one of the more treatable neurological conditions in dogs, and most dogs respond well with the right care.
TL;DR
- Generalized tremor syndrome causes whole-body tremors in small-breed dogs like Maltese, West Highland Terriers, and Bichon Frise. The exact cause is unknown but thought to be immune-mediated.
- Signs include fine, rhythmic whole-body shaking that gets worse with excitement and eases with rest. Your dog stays alert and responsive throughout.
- Diagnosis involves ruling out toxins, seizures, pain, and other causes. Filming the episode before your vet visit is one of the most helpful things you can do.
- Treatment is usually prednisone, and most dogs improve significantly within one to two weeks. The dose is then slowly tapered over time.
- The diagnostic workup and ongoing medication add up. Pet insurance enrolled before symptoms appear can help cover a condition like this.
What is generalized tremor syndrome in dogs?
Generalized tremor syndrome is a condition where a dog’s body shakes continuously, not just one limb or one moment, but the whole body, rhythmically and repeatedly. The tremors are fine and fast, almost like a vibration, rather than the jerking you’d see in a seizure.
It’s called “idiopathic,” which just means vets don’t know the exact trigger. The leading theory is that it’s immune-mediated, meaning the dog’s own immune system is attacking part of the nervous system, specifically the myelin (the protective coating around nerve fibers). It’s not contagious, it’s not caused by something the owner did, and it’s not a death sentence.
You’ll most often see this in young adult small-breed dogs, typically between one and six years old. The breeds most commonly affected are Maltese, West Highland Terriers (Westies), and Bichon Frise, which is why it earned the nickname “little white shaker syndrome” or “white dog shaker syndrome.” But GTS can show up in any small breed, and occasionally in larger dogs too.
What does shaker syndrome look like?
The signs are distinctive once you know what to look for:
- Whole-body tremors that look like a fine, constant shiver, even when your dog isn’t cold
- Shaking that worsens with excitement, stress, or activity and eases when your dog is resting or sleeping. This is a key detail.
- Rapid, involuntary eye movement (called nystagmus), where the eyes flick back and forth
- Mild unsteadiness or a slight wobble when walking
- Normal alertness. Your dog still knows you, responds to their name, and isn’t mentally checked out
That last point matters. A dog with GTS is typically still present and responsive. They’re shaking, but they’re still themselves.
Is it shaker syndrome, a toxin, or a seizure?
Not all whole-body tremors are GTS. Here’s how to read what you’re seeing.
GTS vs. seizures
A seizure usually involves loss of consciousness or awareness, rigid muscle contractions or paddling legs, loss of bladder or bowel control, and a confused, disoriented phase afterward where your dog seems lost or dazed. GTS tremors don’t typically include any of that. If your dog is unresponsive, stiffening dramatically, or seems completely out of it afterward, go to an emergency vet now.
GTS vs. toxin ingestion
Toxin-related tremors, from things like xylitol, certain mushrooms, permethrin in some flea products, or chocolate, tend to come on suddenly and may be accompanied by vomiting, drooling, collapse, or extreme agitation. They often feel more violent or erratic than the fine, rhythmic shaking of GTS. If there’s any chance your dog got into something, treat it as an emergency and call your vet or an animal poison control line immediately.
GTS vs. pain
Dogs shaking from pain usually guard a body part, cry out when touched, or refuse to move normally. GTS dogs don’t typically show obvious pain responses.
Film it before you go to the vet
Whatever you’re seeing, grab your phone and record it. Tremors often calm down the moment a dog enters a clinic. A short video of your dog mid-episode is one of the most useful things you can bring to the appointment. It can change the entire diagnostic conversation.
How do vets diagnose generalized tremor syndrome?
There’s no single test that confirms GTS. Diagnosis is mostly about ruling everything else out. Your vet will likely recommend:
| Test | What it’s looking for |
|---|---|
| Full neurological exam | Reflexes, coordination, and awareness |
| Bloodwork and urinalysis | Organ issues, infections, or metabolic causes of tremors |
| Toxin screening | If ingestion is possible |
| MRI or spinal tap | Rules out infections or inflammation in the nervous system in more complex cases |
The steroid response itself is also informative. If your dog responds dramatically to prednisone, that strongly supports a GTS diagnosis. Vets sometimes use this response to help confirm what they already suspected.
How is generalized tremor syndrome treated?
Most dogs with GTS respond well to corticosteroids, specifically prednisone. Most owners start seeing real improvement within one to two weeks of starting treatment.
Treatment typically follows this path:
- Starting on a higher dose of prednisone to get the tremors under control
- Slowly tapering the dose over several weeks or months as your dog improves
- Finding the lowest effective maintenance dose, or eventually coming off medication entirely in some dogs
If prednisone alone isn’t enough, vets may add another medication that also modulates the immune response. The prognosis is generally good. Many dogs go into full remission. Relapses can happen, but they’re usually manageable with another round of treatment.
Does pet insurance cover generalized tremor syndrome?
Yes, GTS is eligible for coverage under a Lemonade Pet accident and illness policy, when the condition isn’t pre-existing. That means your dog shouldn’t be showing any signs or symptoms before your policy starts or during your waiting period.
The workup to rule out toxins, seizures, and other conditions can involve blood panels, imaging, and specialist visits. Then there’s the ongoing cost of medication and follow-up appointments to manage the taper correctly. Getting coverage in place while your dog is healthy is what makes it actually useful when you need it. If you have a Maltese, Westie, or Bichon Frise who seems completely fine right now, that’s exactly when to look into a policy.
Before we go
Watching your dog shake and not knowing why is frightening. But if what you’re seeing lines up with GTS symptoms, especially in a young small-breed dog, there’s real reason to feel hopeful. This is a condition that vets know how to treat, and most dogs do well. Call your vet, bring that video you filmed, and ask specifically about whether GTS is on their list of possibilities. The sooner you start the conversation, the sooner you can get your dog feeling better.
Frequently Asked Questions
Is generalized tremor syndrome (shaker syndrome) life-threatening?
It’s not typically life-threatening. Most dogs with GTS respond well to corticosteroids like prednisone, and many go into full remission. It’s a serious condition that needs veterinary attention, but the prognosis is generally good.
Can large dogs or non-white dogs get shaker syndrome?
Yes. While generalized tremor syndrome is most common in small white breeds like Maltese, West Highland Terriers, and Bichon Frise, it can occur in any breed or coat color. The “white dog shaker syndrome” nickname reflects where it’s most often seen, not a strict rule.
How long does my dog need to stay on prednisone for GTS?
It varies. Most dogs start on a higher dose and are gradually tapered over weeks to months as they improve. Some dogs can eventually stop medication entirely; others need a low long-term dose. Your vet will guide the taper based on how your dog responds.
How do I know if my dog's shaking is an emergency?
Go to an emergency vet immediately if your dog loses consciousness, has violent or jerking muscle spasms, loses bladder or bowel control, seems completely unaware of you, or if you think they may have eaten something toxic. GTS tremors are typically rhythmic and fine, and your dog stays alert throughout.
A few quick words, because we <3 our lawyers: This post is general in nature, and any statement in it doesn’t alter the terms, conditions, exclusions, or limitations of the policies issued, which differ according to your state of residence. You’re encouraged to discuss your specific circumstances with your own professional advisors. The purpose of this post is merely to provide you with info and insights you can use to make such discussions more productive! Naturally, all comments by, or references to, third parties represent their own views, and Lemonade assumes no responsibility for them. Coverage may not be available in all states. Please note that statements about coverages, policy management, claims processes, Giveback, and customer support apply to policies underwritten by Lemonade Insurance Company or Metromile Insurance Company, a Lemonade company, sold by Lemonade Insurance Agency, LLC. The statements do not apply to policies underwritten by other carriers.