Epilepsy in Dogs: Recognising Seizures and Managing a Lifelong Condition

Epilepsy is one of the most common neurological conditions affecting dogs. It is characterised by recurrent seizures caused by abnormal electrical activity in the brain. While seizures can be frightening to witness, many dogs with epilepsy can live long, happy lives with appropriate management.

Understanding what epilepsy is, how seizures present and how the condition is treated can help owners feel more confident and prepared.

What is Epilepsy?

Epilepsy refers to a tendency to experience repeated, unprovoked seizures. A seizure occurs when there is a sudden surge of abnormal electrical activity in the brain, leading to changes in movement, behaviour or consciousness.

Epilepsy is typically classified into:

• Idiopathic epilepsy – no identifiable underlying cause (most common in dogs)

• Structural epilepsy – caused by a physical problem within the brain

• Reactive seizures – triggered by metabolic or toxic issues outside the brain

Idiopathic epilepsy is particularly common in dogs between 6 months and 6 years of age.

What Does a Seizure Look Like?

Seizures can vary in severity and appearance.

Generalised (Grand Mal) Seizures

These affect the whole body and are the most recognisable type.

Signs include:

• Collapse

• Rigid limbs followed by paddling movements

• Loss of consciousness

• Drooling or foaming at the mouth

• Urination or defecation

• Vocalisation

These seizures typically last between 30 seconds and 2 minutes.

Focal (Partial) Seizures

These affect a specific part of the brain and may be less dramatic.

Signs may include:

• Facial twitching

• Repetitive movements (e.g. chewing, snapping at the air)

• Sudden behavioural changes

• Disorientation

Focal seizures can sometimes progress into generalised seizures.

The Stages of a Seizure

Seizures are often divided into three phases.

1. Pre-ictal Phase (Aura)

Some dogs show warning signs before a seizure, such as:

• Restlessness

• Clinginess or seeking attention

• Hiding or anxiety

This phase may last minutes to hours.

2. Ictal Phase

This is the seizure itself, where abnormal movements or behaviours occur.

3. Post-ictal Phase

After the seizure, dogs may appear:

• Disoriented or confused

• Unsteady

• Temporarily blind

• Hungry or thirsty

• Restless or agitated

This phase can last from minutes to several hours.

Causes of Seizures in Dogs

Seizures can have many underlying causes.

Idiopathic Epilepsy

This is the most common cause in dogs, particularly in young to middle-aged individuals. It is often thought to have a genetic basis.

Intracranial Causes

• Brain tumours

• Inflammation (encephalitis)

• Head trauma

• Congenital abnormalities

Extracranial Causes

• Liver disease

• Kidney disease

• Low blood sugar (hypoglycaemia)

• Toxins (e.g. chocolate, xylitol, certain medications)

• Electrolyte imbalances

Identifying the cause is important for determining treatment.

Breed Predisposition

Certain breeds are more prone to idiopathic epilepsy, including:

• Border Collies

• Labrador Retrievers

• Golden Retrievers

• German Shepherds

• Beagles

Genetics are believed to play a role in these cases.

Diagnosis

Diagnosing epilepsy involves ruling out other causes of seizures.

A veterinary work-up may include:

• Detailed history – including age of onset and seizure pattern

• Physical and neurological examination

• Blood tests – to assess organ function and metabolic causes

• Urinalysis

• Advanced imaging (MRI or CT scan) – if structural disease is suspected

• Cerebrospinal fluid (CSF) analysis – in some cases

Idiopathic epilepsy is typically diagnosed when no underlying cause is found.

When is Treatment Needed?

Not all dogs require medication after a single seizure.

Treatment is usually recommended if:

• Seizures occur more than once every 4–6 weeks

• Seizures are severe or prolonged

• Cluster seizures occur (multiple seizures in a short time)

• Status epilepticus occurs (a seizure lasting more than 5 minutes)

Treatment Options

Anti-Seizure Medication

Common medications include:

• Phenobarbital – a first-line treatment

• Levetiracetam (Keppra) – often used alongside other drugs

• Potassium bromide – used in some cases

• Imepitoin – licensed in some regions for canine epilepsy

These medications aim to reduce seizure frequency and severity.

Emergency Treatment

Dogs experiencing prolonged or repeated seizures may require emergency care, including:

• Injectable anti-seizure medications

• Hospitalisation and monitoring

Treating Underlying Causes

If seizures are caused by another condition, treatment will focus on addressing that issue.

Living with a Dog with Epilepsy

Many dogs with epilepsy live full and active lives with appropriate management.

Key aspects of care include:

• Giving medication consistently and at the same times each day

• Keeping a seizure diary to track frequency and triggers

• Minimising stress and maintaining routine

• Avoiding known toxins

Regular veterinary monitoring is essential to adjust treatment as needed.

What to Do During a Seizure

If your dog has a seizure:

• Stay calm

• Move objects away to prevent injury

• Do not put your hands near the mouth

• Avoid restraining your dog

• Time the seizure

Afterwards, provide a quiet and safe space for recovery.

When to Seek Urgent Veterinary Care

Immediate veterinary attention is required if:

• A seizure lasts longer than 5 minutes

• Multiple seizures occur within 24 hours

• Your dog does not recover normally after a seizure

• This is your dog’s first seizure

• Your dog shows signs of serious illness

Prompt treatment can prevent life-threatening complications.

Prognosis

The outlook for dogs with epilepsy varies depending on the cause.

• Idiopathic epilepsy – often manageable with medication

• Structural or metabolic causes – prognosis depends on the underlying condition

Many dogs achieve good seizure control, although lifelong treatment is often required.

Conclusion

Epilepsy in dogs is a common neurological condition that can be alarming but is often manageable with the right approach. Recognising the signs of seizures, understanding when to seek help and following a consistent treatment plan are key to successful management.

With appropriate veterinary care and ongoing monitoring, many dogs with epilepsy can enjoy a high quality of life and remain happy, active members of the family.