It is natural to be concerned when you see your dog trembling. While tremors can be a sign of a serious medical issue, they can also be caused by harmless factors such as excitement or simply old age.
Shaking is a symptom with a wide range of causes, including infections, neurological conditions, or exposure to cold temperatures. Because the spectrum is so broad—from benign to severe—it can be difficult to tell the difference between a harmless shiver and a medical emergency just by looking.
If you find yourself constantly asking, Why's my dog shaking?, this guide is for you. We will break down the common reasons for tremors, how to distinguish between behavioral and medical issues, and the immediate steps you should take to help your pet.
Why Is My Dog Shaking For No Reason? Understanding the Invisible Triggers
One of the most confusing parts of being a dog owner is seeing symptoms without an obvious physical cause. You might look at your pup resting on the rug and wonder, Why is my dog shaking for no reason? The truth is, there is always a reason, but it isn't always visible to the naked eye. Shaking is often the only symptom displayed for internal or emotional conditions.

When a dog appears to shake without cause, it is often categorized into one of three buckets: emotional responses, environmental reactions, or specific medical conditions.
1. The Emotional Response: Anxiety and Fear
Shaking is one of the most common signs of anxiety in dogs. Because canines are experts at hiding their distress from their owners, they may not whine or bark when they are upset; instead, their body reacts by trembling.
Seemingly benign circumstances can trigger acute anxiety episodes. These might include:
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Thunderstorms: Loud noises are frequent stress triggers.
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Separation: Simply the owner being away can cause distress.
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Routine Changes: A disruption in their daily schedule can leave them feeling insecure.
If you are wondering, Why is my dog shaking for no reason? and there is no physical injury, identifying the source of anxiety and eliminating it is the first step.
2. The Happy Shakes: Excitement
On the opposite end of the spectrum is excitement. Dogs are excitable animals, and something as simple as you coming home from work can send them into a fit of ecstasy.
This happiness can affect their nervous system, resulting in shaking. Typically, you can distinguish this from bad shaking by looking for other context clues. If the shaking is accompanied by a wagging tail, jumping, and extra affection, it is rarely a cause for concern.
3. Environmental Factors: The Cold
Dogs are prone to getting cold, just like humans. If you are wondering why your dog is shivering, check the temperature. Exposure to low temperatures for a prolonged period can lead to shivering. It is important to pay attention to how your canine responds when out in the cold, as exposure can be detrimental to their health.
Medical Causes: When Shaking Signals Illness
While anxiety and a cold are manageable at home, many causes of shaking are rooted in physical illness.
Fever and Infection
A dog with a high fever is likely to shake as the body works to eliminate an infection. If your dog has a fever and is shaking, monitor them carefully. The higher the fever, the more they may shake, and a very high fever can be extremely dangerous.
Nausea
Shaking can be a key indicator that your dog is nauseous and perhaps about to vomit. Nausea triggers a response throughout the nervous system that manifests as shaking. Typically, this type of shaking becomes less severe after the dog has successfully thrown up.
Pain
Dogs can shake simply because they are in pain. This could be from an injury or an underlying issue. Since they cannot speak, you should look for accompanying symptoms of pain, such as:
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Limping
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Lethargy
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Panting
If you suspect pain is the cause, a professional veterinary assessment is required to treat it.
Neurological Issues and Senior Dogs
Sometimes, the shaking is not a temporary reaction but a sign of a deeper neurological issue or the natural aging process.
Dogs' Back Legs Shake While Standing: The Factor of Old Age
As dogs age, tremors become somewhat common, especially affecting the legs. One specific issue owners frequently notice is when dog's back legs shake while standing.
This is often an idiopathic condition, meaning the exact cause is unknown. It is typically diagnosed only after all other common causes for shaking have been ruled out. While seeing your senior dog's legs tremble can be sad, this condition is generally considered benign.
Generalized Tremor Syndrome (GTS)
There is also a condition known as Generalized Tremor Syndrome (GTS). This mysterious condition affects certain breeds more than others, but it can occur in any dog.
Unlike old-age tremors, GTS usually presents before a dog turns 2 years old. Veterinarians have found that steroid-based treatments are often successful at managing the tremors associated with GTS.
Distemper
One of the most serious viral causes of shaking is Canine Distemper. Tremors are a very common symptom of this potentially serious virus, which attacks the respiratory and nervous systems.
Distemper is distinguishable from simple anxiety or a cold because of the accompanying symptoms, which include:
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Pus-like discharge from the eyes
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Vomiting
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Diarrhea
This requires immediate veterinary treatment.
Seizures and Toxins
Shaking can also indicate a seizure, which is a medical emergency. Seizures can result from various causes, ranging from genetic neurological disorders to infections. Similarly, sudden shaking can be a sign of poisoning, indicating that the kidneys or liver are failing. If you suspect your dog has eaten something poisonous, take them to an emergency veterinarian immediately.
What To Do When Your Dog Is Shaking
Knowing what to do when your dog is shaking is crucial for their safety.
The golden rule is: Always seek out advice from a veterinarian.
Any unusual or sudden shaking that concerns you is a valid reason to visit a vet as soon as possible. Because shaking can have so many causes, it is always better to allow a vet to examine them to rule out any serious danger.
The Veterinary Diagnosis Process
Treating the shaking requires treating the underlying cause.
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Blood and Urine Tests: Your veterinarian will run blood and urine tests to assess nutrient status and signs of infection.
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Neurological Referral: They may refer your dog to a neurologist to determine if the shaking is neurological.
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Advanced Procedures: This can include a spinal tap procedure along with advanced imaging scans.
Medical Treatments
Each cause has a unique treatment method.
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Steroids: If the shaking is not due to an underlying condition, the vet will likely start the dog on a prednisone treatment (a corticosteroid). Typically, symptoms resolve within 1 to 2 weeks.
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Immunosuppressants: If prednisone alone does not work, immunosuppressive medications may be prescribed.
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Lifestyle Changes: Treatment may also involve changes to their daily routine.
A Natural Approach: CBD and Shaking
Many pet owners are interested in how CBD might support their dogs. There are now CBD-infused products formulated specially for dogs that introduce lab-tested hemp into their body.
How Does It Work?
Cannabidiol (CBD) attaches to cannabinoid receptors throughout your dog’s body. This allows regulatory actions to occur, which may affect tremors and their underlying causes.
Benefits for Shaking
Because shaking can be related to the nervous system, CBD is often considered for support.
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Managing Symptoms: The interaction with receptors may help manage symptoms like tremors.
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Holistic Support: It introduces clean, dog-friendly ingredients into their routine.
However, you should always speak with a veterinarian about incorporating dog edibles into your canine’s routine. The goal is to manage their symptoms alongside whichever treatments your veterinarian prescribes.
Conclusion
Whether it is excitement or the chill of winter, seeing your dog shake is often a part of pet ownership. However, because it can also signal pain or disease, it is a symptom that demands attention. By understanding the causes and knowing what to do when your dog is shaking, you can ensure your best friend lives a happy, healthy life.
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