Seizures in Older Dogs: First Aid and Vet Thresholds

A first seizure in an older dog needs veterinary assessment, even if your dog seems normal afterward. Do not dismiss it as aging or assume it means a brain tumor. Age when seizures begin, how long they last and how your dog recovers all help the vet decide what to investigate. PDSA’s veterinary guidance recommends a check after a seizure, including when recovery appears complete.

Go now, call promptly or monitor under a plan?

Emergency care: prolonged or repeated seizures

• If the seizure continues beyond two minutes, call an emergency vet immediately. Do not wait for five minutes before seeking help.
• A seizure reaching five minutes is an emergency. Prolonged seizures can damage the brain and other organs.
• Repeated seizures close together also need emergency care, especially if your dog has not recovered between episodes. Tell the clinic how many have occurred and whether your dog regained awareness.

PDSA advises calling once a seizure exceeds two minutes; VCA explains the dangers of prolonged and clustered seizures. Ask the emergency clinic how to move your dog safely if they are still seizing. PDSA advises against transport during an active seizure unless the vet directs you.

Call promptly: a first seizure that has stopped

If this is your older dog’s first suspected seizure and they are coming around, contact your vet as recovery begins and arrange assessment. Do not wait for a second episode to make the call. Also report seizures that are becoming longer, more frequent or more severe in a dog with an existing diagnosis. PDSA advises veterinary contact in these situations.

Monitor at home: only within an agreed veterinary plan

For a dog already assessed for seizures, a brief episode followed by their usual recovery may fit the vet’s home-monitoring plan. Follow that plan and record the event. Home monitoring is not a substitute for assessing a new seizure in a senior dog.

What to do during and after a seizure

1. Start a timer. Record when the episode begins and ends; note the recovery time separately.
2. Prevent injury. Move nearby objects away and keep children and other pets back. Protect your dog from falls without putting yourself near their mouth.
3. Put nothing in the mouth. Dogs do not swallow their tongues during seizures. Fingers or objects can cause serious bites or injure your dog.
4. Take a short video if safe. Do not let filming delay a veterinary call.
5. Keep the recovery area safe and quiet. Confusion, pacing, restlessness and temporary blindness can follow a seizure. Tell the vet what you are seeing rather than assuming every change is harmless.

See VCA’s seizure safety and recovery advice and PDSA’s guidance on recording the episode and recovery.

Why a first seizure later in life matters

Idiopathic epilepsy—epilepsy without an identifiable underlying cause—typically begins between six months and six years. A dog whose epilepsy began when young may still have seizures as a senior; that differs from an older dog having their first episode.

New-onset seizures later in life prompt investigation for other causes. Possibilities include severe liver disease, kidney failure, low blood sugar, toxins, head injury and disease within the brain, including tumors. A seizure’s appearance cannot identify the cause. PDSA and VCA describe these causes.

Seizures do not always involve full-body convulsions. A focal seizure may cause twitching in just the face or a limb, without loss of consciousness. VCA describes both generalized and focal seizures.

Not every collapse or twitch is a seizure. Fainting and some movement or balance disorders can look similar; a video and history help the vet distinguish them, according to the veterinary epilepsy task force consensus. See our guide to neurological warning signs in dogs for related changes to report.

What to bring to the vet

Bring the video and a log of duration, recovery, previous episodes and recent behavior changes. List all medicines, supplements and flea products, any missed seizure medication, and possible toxin exposure.

The vet may start with examination, blood tests and urine tests. For seizures first appearing after six years, the 2015 veterinary epilepsy task force consensus recommends brain MRI and spinal-fluid testing after metabolic and toxic causes are excluded. Discuss which tests would change care for your dog.

If seizure medication is already prescribed, do not stop it or change its timing without veterinary instructions. Sudden withdrawal can trigger severe seizures, according to VCA.