If your dog is shaking violently—almost like they’re having a seizure—it can be terrifying to witness. But not all shaking is caused by seizures. Understanding the difference is key to getting the right help fast.
We outline the common causes of dog shaking like seizure, what you can do at home, and when to seek veterinary help.
Dog Shaking Like Seizure — Why It Happens
Dogs may shake like they’re having a seizure due to muscle tremors, toxin exposure, neurological disease, or metabolic imbalances. While some episodes are true seizures, others can mimic seizures closely without affecting consciousness.
Common Causes of Dog Shaking Like Seizure
Generalized Tremor Syndrome (GTS)
Also known as “white shaker syndrome,” GTS causes full-body tremors that resemble seizures but don’t involve loss of awareness.
Dogs remain alert and responsive but may shake persistently or rhythmically.
It’s most common in small white breeds like Maltese or Westies but can affect any dog.
Treatment often includes corticosteroids and supportive care.
Toxic Exposure
Toxins can cause shaking, twitching, and even true seizures if the dose is high.
Symptoms often escalate quickly and may include vomiting, disorientation, or collapse.
Some dogs will shake violently but remain partially aware—mimicking seizures.
Immediate veterinary care is crucial for recovery and detox.
Seizures (Epilepsy or Secondary Seizures)
True seizures involve uncontrolled electrical activity in the brain.
Dogs may stiffen, fall over, paddle their legs, drool, or lose control of their bladder.
Afterward, they often enter a dazed state known as the post-ictal phase.
Recurring seizures or first-time events should always be evaluated by your vet.
Related: Dog shaking and not eating (Causes and what to do)
Hypocalcemia or Hypoglycemia
Low calcium or blood sugar levels can cause severe trembling or convulsions.
This is particularly common in puppies, small breeds, or nursing mothers.
Dogs may collapse, tremble, act confused, or appear uncoordinated.
Supplementation and treatment of the underlying issue usually resolve symptoms.
Neurological Disorders (e.g., Brain Tumors, Inflammation)
Diseases that affect the brain or nervous system may cause seizure-like shaking.
Dogs may also show personality changes, circling, or changes in vision.
These causes are often progressive and may worsen without intervention.
Advanced diagnostics such as MRI or spinal taps may be required for diagnosis.
What to Do If Your Dog Is Shaking Like a Seizure
Stay calm and do not try to restrain your dog unless they’re in immediate danger.
Keep them away from stairs, water bowls, or hard objects.
Time the episode—how long it lasts, what body parts were affected, and whether your dog lost consciousness.
Do not feed or medicate them unless instructed by your vet.
Contact your veterinarian immediately, especially if the episode repeats or lasts over two minutes.
When to Call or Visit Your Vet
Get urgent veterinary help if your dog:
Shakes violently or collapses
Appears unconscious or disoriented afterward
Has repeated shaking episodes in a short time
Ingested something toxic
Seems to worsen or become unresponsive
Prompt medical attention can prevent complications and help identify the underlying cause.
Read more: Dog Shaking Like Cold (What it means)
Key Takeaway
If your dog is shaking like they’re having a seizure, don’t panic—but don’t wait it out either.
Whether it’s a true seizure or something that mimics one, fast action and clear observation can make all the difference in your dog’s care and recovery.