Why Is My Dog Having Seizures? Causes and Next Steps
If your dog has had a seizure, you are likely looking for answers about what caused it and what to do next. This article explains why dogs have seizures, what they look like, and when to seek veterinary help.
Quick Answer
A seizure is a sudden, uncontrolled electrical disturbance in the brain. Dogs can have seizures for many reasons, including idiopathic epilepsy, metabolic disorders, toxins, brain tumors, and infections. Any first seizure warrants veterinary evaluation. If a seizure lasts longer than 2-3 minutes or multiple seizures occur within 24 hours, seek emergency veterinary care immediately.
SYMPTOM TRIAGE: Watching your dog seizure is alarming, and understanding the pattern helps your veterinarian identify the cause. Use our guided tool at PawAI Lab Symptom Triage.
What a Seizure Looks Like
A seizure happens when there is a sudden, uncontrolled burst of electrical activity in the brain. The signs can vary, but most seizures in dogs follow a recognizable pattern.
Before a seizure, some dogs show subtle changes called an aura. Your dog may seem restless, anxious, clingy, or seek out a hiding spot. This phase can last from a few seconds to several minutes.
During the seizure itself, you may observe:
- Convulsions or full-body shaking
- Muscle twitching, often starting in one area
- Loss of consciousness or unresponsiveness
- Drooling or foaming at the mouth
- Paddling of the legs as if running
- Loss of bowel or bladder control
- Rigid or stiff limbs
After the seizure, dogs enter a recovery period called the post-ictal phase. Your dog may seem confused, disoriented, wobbly, or temporarily blind. This phase can last from minutes to hours and varies between dogs.
Why Dogs Have Seizures
There are many possible reasons a dog may have a seizure. A veterinarian can assess your dog and help identify the underlying cause.
Idiopathic epilepsy is one of the most common causes. "Idiopathic" means the exact cause cannot be identified. This form often begins between six months and six years of age and may have a genetic component in certain breeds.
Other factors that may be associated with seizures include:
- Metabolic disorders such as low blood sugar (hypoglycemia), liver disease, or kidney disease
- Toxins and poisons including certain plants, human foods like chocolate or xylitol, pesticides, and some medications
- Brain tumors, which are more common in older dogs
- Infections such as canine distemper or other diseases affecting the brain
- Head trauma from an accident or injury
- Heatstroke, which can damage the brain and trigger seizures
In some cases, the cause remains unknown even after testing. Keeping a detailed record of each seizure can help your veterinarian narrow down the possibilities.
What to Do During and After a Seizure
Knowing how to respond can keep your dog safer and provide your veterinarian with useful information.
During a seizure:
- Stay calm and note the time the seizure begins
- Do not touch or hold your dog, as they cannot control their movements and may bite unintentionally
- Move furniture and objects away to prevent injury
- Keep other pets and children away
- Dim the lights and reduce noise if possible
After the seizure:
- Time how long the seizure lasted
- Speak softly and reassure your dog as they recover
- Offer water once your dog is fully alert
- Record a video if a seizure happens again, as this can help your veterinarian
When to Contact a Veterinarian
Any first seizure warrants veterinary evaluation, even if your dog seems fine afterward. A veterinarian can perform an examination and recommend appropriate testing.
Seek emergency veterinary care immediately if:
- A seizure lasts longer than 2-3 minutes (this is called status epilepticus and is a medical emergency)
- Your dog has cluster seizures (multiple seizures within 24 hours)
- The seizure is accompanied by a high fever
- Your dog has difficulty breathing during or after the seizure
- Your dog does not regain consciousness
- Your dog is injured during the seizure
For non-urgent follow-up, contact your veterinarian to schedule an appointment within a few days of the first seizure. If seizures become more frequent or change in character, let your veterinarian know.
Frequently Asked Questions
Can a veterinarian tell me why my dog is having seizures?
A veterinarian can perform a physical exam, blood work, and sometimes advanced imaging to help identify the cause. In some cases, the underlying reason cannot be determined, and the diagnosis may be idiopathic epilepsy. A thorough history of the seizures helps guide the evaluation.
Are seizures in dogs life-threatening?
A single, short seizure is usually not life-threatening on its own. However, prolonged seizures lasting more than a few minutes or clusters of seizures can be dangerous and require emergency care. Prompt veterinary evaluation is important for any dog experiencing seizures.
Will my dog need medication for seizures?
Whether medication is needed depends on the frequency, severity, and underlying cause of the seizures. A veterinarian can determine whether treatment is appropriate. Anti-seizure medications are prescription-only and must be prescribed and monitored by a veterinarian.
What should I record about my dog's seizures?
Note the date, time, duration, and characteristics of each seizure. Describe what your dog was doing before, during, and after. This information helps your veterinarian identify patterns and determine the best course of action.
Sources
- American Animal Hospital Association (AAHA): Canine Seizure Management Guidelines
- Cornell University College of Veterinary Medicine: Seizures in Dogs
- VCA Animal Hospitals: Seizures in Dogs
- Merck Veterinary Manual: Seizure Disorders in Dogs
Disclaimer
This article is provided for general informational purposes only and does not constitute veterinary advice, diagnosis, or treatment. It is not a substitute for professional veterinary care. Always consult a licensed veterinarian regarding your dog's specific condition, especially if symptoms are severe, progressing, or persistent.