Symptoms and Management of Canine Epilepsy

Brain & CognitionQ&AMeongsiljang Veterinary Advisory Board

Canine epilepsy is a condition characterized by recurrent seizures due to abnormal electrical activity in the brain. While a complete cure is difficult, appropriate medication and home care can reduce seizure frequency and allow your dog to maintain a normal daily life.

What Is Canine Epilepsy?

Canine epilepsy is a condition characterized by recurring seizures caused by abnormal electrical activity in the brain. Although it is a chronic disease that is difficult to cure completely, the frequency of seizures can be significantly reduced by combining anticonvulsant medication with consistent home care. Most dogs with epilepsy can live normal, everyday lives without major disruptions as long as their medication is properly managed, so there is no need to worry too much.

Causes and Types of Epilepsy

Canine epilepsy is broadly categorized into three main types.

Idiopathic epilepsy: This occurs when seizures recur without any structural abnormalities in the brain. Genetic factors play a significant role, and the first seizure typically appears between 6 months and 6 years of age. It is the most common form of canine epilepsy.

Structural epilepsy: This type arises from intrinsic brain issues such as brain tumors, encephalitis, or brain malformations, which trigger seizures.

Reactive seizures: These are caused by factors outside the brain, such as hypoglycemia, liver disease, or poisoning. Once the underlying cause is resolved, the seizures may stop.

Checklist of Epileptic Seizure Symptoms

If you notice these symptoms in your dog, it may indicate an epileptic seizure.

Generalized convulsions: The body becomes stiff and trembles, with legs paddling in the air.

Loss of consciousness: The dog fails to recognize its owner and does not respond when called.

Drooling and foaming: Saliva or foam may appear at the mouth, and the jaw may clench tightly.

Incontinence: The dog may involuntarily urinate or defecate during the seizure.

Transient confusion: The dog may suddenly stare fixedly at one spot or snap at the air.

A worried pet owner watching over their anxious dog

The Three Stages of a Seizure

Seizures typically progress through three stages.

Prodromal phase: Before a seizure occurs, your pet may show signs of restlessness, clinginess toward you, or attempts to hide in corners. According to veterinary textbooks, these behavioral changes can appear anywhere from a few hours to several days before the seizure.

Ictal phase: This is the stage during which the actual seizure occurs. Symptoms include generalized convulsions, loss of consciousness, and excessive drooling. The episode is usually brief, lasting no more than 1 to 2 minutes. Because owners often perceive the seizure as lasting longer than it actually does, it is helpful to note the exact time it ends.

Postictal phase: After the seizure subsides, your pet may appear disoriented, stumble, or exhibit unusual anxiety, compulsive pacing, or excessive thirst. In some cases, they may behave as if they are temporarily blind. These postictal symptoms can last from several minutes to several hours.

An illustration of a dog showing the three stages of a seizure

When to Go to the Vet Immediately

If a seizure lasts longer than five minutes, or if another seizure begins before consciousness is regained, it is classified as status epilepticus and can be life-threatening. Cluster seizures, defined as two or more seizures occurring within a single day, also constitute a medical emergency. In these situations, seek immediate care at the nearest veterinary emergency clinic without delay.

How Is Epilepsy Diagnosed?

Epilepsy is difficult to diagnose with a single test, so it requires a process of ruling out other potential causes one by one. First, your veterinarian will check for causes outside the brain, such as hypoglycemia, liver disease, or electrolyte imbalances, using blood and blood chemistry tests. If no abnormalities are found, they will perform an MRI of the brain and a cerebrospinal fluid analysis to check for structural issues like brain tumors or encephalitis. According to veterinary internal medicine textbooks, idiopathic epilepsy can be strongly suspected if seizures first appear between 6 months and 6 years of age and neurological exams are normal between seizures.

Anticonvulsant Treatment: Which Medications Are Used?

Veterinarians prescribe anticonvulsants based on seizure frequency and severity. According to veterinary internal medicine textbooks, medication is started if seizures occur more than once a month, or if cluster seizures or status epilepticus have occurred.

Phenobarbital: This is the oldest and most widely used first-line anticonvulsant. While effective, regular monitoring of liver values is necessary during long-term use.

Levetiracetam: This anticonvulsant has fewer side effects and is primarily used in combination with other anticonvulsants. It is not recommended as a sole long-term treatment for idiopathic epilepsy, so whether and how it is used must strictly follow your veterinarian’s judgment.

The type and dosage of medication must be determined by a veterinarian based on your pet’s condition. Owners should never adjust medication on their own, as this can be dangerous.

A veterinarian explaining the treatment plan to the pet owner

How to Respond When a Seizure Occurs

It’s easy to panic when a seizure begins, but staying calm is the most important thing you can do.

Do not put your hands in their mouth: Dogs cannot swallow their tongues. Forcing the mouth open can result in you being bitten.

Clear the area for safety: Move your dog away from hazards like furniture edges or stairs where they could injure themselves.

Time the seizure: Note the start and end times. If the seizure lasts longer than five minutes, it is an emergency.

Record a video: Capturing the seizure on video can be extremely helpful for your veterinarian’s diagnosis.

Observe quietly: Avoid loud noises and bright lights, and stay by your dog’s side until they recover.

A guardian who stays by their dog’s side in a safe space

The Key to Long-Term Management: Keeping a Seizure Diary

Epilepsy is a condition that requires long-term management. Keeping a consistent seizure diary helps you monitor treatment effectiveness and greatly assists in adjusting medications.

Date and time of seizure: Record exactly when the seizure started.

Duration: Note how many minutes the seizure lasted.

Seizure characteristics: Document whether it was a generalized convulsion or a focal seizure.

Recovery time: The time it takes for your pet to return to normal is also important.

Don’t forget to have regular blood tests to check drug blood levels and liver function.

Breeds Prone to Epilepsy

Beagles, Labrador Retrievers, Golden Retrievers, Belgian Shepherds, and Border Collies are known to have a higher incidence of idiopathic epilepsy. In addition, elevated rates have been reported in various other breeds, including Boxers, Dalmatians, Cocker Spaniels, Bernese Mountain Dogs, and Irish Setters. If you own one of these breeds, it’s wise to familiarize yourself with seizure symptoms in advance and prepare to respond quickly should a first seizure occur.

Reviewed by a veterinarian

Dr. Tony — Punnawat Phongkittirak

Veterinarian

A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.

Frequently Asked Questions

Can canine epilepsy be cured?

Idiopathic epilepsy is a chronic condition that is difficult to cure. However, consistent use of anticonvulsant medications can significantly reduce seizure frequency, allowing many dogs to live their daily lives with minimal disruption. In the case of reactive seizures, treating the underlying cause may stop the seizures altogether.

Is it okay to hold my dog during a seizure?

Forcing your dog to stay still or holding them during a seizure can result in accidental bites. It’s best to simply clear away any nearby hazards and observe quietly. Once the seizure ends, gently staying by your dog’s side during their recovery period is the most supportive approach.

Do I need to give my pet anti-seizure medication for the rest of their life?

Most dogs with idiopathic epilepsy require lifelong medication management. Even if your dog goes a long time without seizures, stopping the medication on your own can actually trigger more severe seizures. Always consult your veterinarian before making any changes to your dog’s medication.

Can dogs with epilepsy still lead a normal life?

Yes, with proper medication management, your pet can enjoy walks, playtime, and daily activities. However, caution is needed for activities that could be dangerous during a seizure, such as swimming or being at high places. Maintaining a regular daily routine can also be helpful.

Should I treat my pet even if they’ve only had one seizure?

If your pet has had only a single seizure, immediate medication may not be necessary. Your veterinarian will determine the appropriate time to begin treatment by evaluating the frequency and severity of the seizures, as well as checking for any underlying conditions. It is important to have your pet examined by a veterinarian after their first seizure.

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References

[1] Moeser A, Anticonvulsants, Small Animal Critical Care Medicine, 3rd Ed

[2] Notes on Canine Internal Medicine, 4th Ed, Chapter: Epilepsy

[3] Handbook of Veterinary Pharmacology, Chapter II: Anticonvulsant Drugs

[4] Bateman SW, Parent JM, Clinical findings, treatment, and outcome of dogs with status epilepticus or cluster seizures: 156 cases (1990-1995), J Am Vet Med Assoc 215(10):1463-1468, 1999