Your Dog Has Had a Seizure. What Happens Next?
A practical guide to caring for your dog, making treatment decisions and managing the uncertainty that follows.
Few things are as frightening as watching your dog have a seizure.
One moment they are themselves and the next they may collapse, stiffen, paddle their legs, salivate or appear completely unaware of you. Even when it lasts less than a minute, it can feel like forever.
I know that fear personally. My Border Collie Sonny experienced seizures from a young age, and I remember the uncertainty that followed. Will it happen again? Is this epilepsy? Does he need medication? Can I safely leave him alone? How can I protect him?
The first thing to understand is:
One seizure is an event. It is not yet a diagnosis of epilepsy.
What should you do during a seizure?
Try to focus on keeping your dog safe rather than attempting to stop the movements.
Start timing the seizure.
Move furniture and hard objects away.
Block access to stairs, roads, pools and other hazards.
Keep children and other animals away.
Reduce noise and bright light.
Record a video if it is safe to do so.
Do not restrain your dog or put your hands near their mouth.
Keep them nil by mouth until they are fully awake.
If your dog has prescribed rescue medication, follow your veterinarian’s instructions for when and how to use it.
Once the seizure stops, allow your dog to recover somewhere quiet, cool and safe. They may be confused, restless, unsteady, hungry, thirsty or temporarily unable to see properly.
Contact your veterinarian after a first suspected seizure, even if your dog appears to recover completely.
When is a dog seizure an emergency?
Seek urgent veterinary care if:
the seizure lasts five minutes or longer;
another seizure begins before your dog has properly recovered;
several seizures occur close together;
breathing remains abnormal;
poisoning or medication toxicity may be possible;
your dog is injured; or
their recovery does not seem normal.
Was it definitely a seizure?
Not every episode of shaking, collapse or unusual behaviour is necessarily a seizure.
Fainting, pain episodes, tremors, vestibular attacks, movement disorders and some cardiac problems can look remarkably similar. This is why timing the event, recording a video and noting what happened before and afterwards can be so valuable.
A seizure is caused by a temporary disturbance in brain activity. Some involve the whole body, while focal seizures may cause subtler signs such as facial twitching, repetitive jaw movements, staring or unusual behaviour.
A seizure is an event. Epilepsy is a condition that causes a predisposition to recurrent, unprovoked seizures.
Epilepsy is generally diagnosed after a dog has experienced at least two unprovoked seizures more than 24 hours apart.
The word unprovoked matters. A seizure triggered by a temporary problem such as a toxin, very low blood sugar, liver dysfunction or an electrolyte disturbance is considered a reactive seizure and does not, by itself, mean the dog has epilepsy.
Epilepsy may be structural, where an underlying brain abnormality is identified, or idiopathic, where recurrent seizures occur but no underlying metabolic or structural cause is found.
How is the cause investigated?
There is no single test that simply says, “Your dog has idiopathic epilepsy.”
Your veterinarian will consider:
your dog’s age and medical history;
what the episode looked like;
whether they are normal between events;
blood and urine test results;
possible exposure to toxins, medications or other products; and
whether referral, MRI or further neurological investigation is appropriate.
Some dogs require extensive investigation, while for others careful monitoring after one short event may be a reasonable next step.
You may leave the vet with a plan, not necessarily a prescription
After witnessing something as frightening as a seizure, it is natural to want an immediate treatment... something to "fix" them.
It can feel uncomfortable leaving the veterinary clinic without medication, as though nothing has been done. But after one brief seizure, the most appropriate next step may be investigation, observation and preparation rather than starting daily medication immediately.
A good plan might include initial testing, reviewing possible triggers or exposures, keeping a seizure diary, and knowing what would warrant follow-up, referral or emergency care.
“Watch and document” does not mean “ignore and hope”. Done properly, it is an active clinical plan.
How do you decide what treatment is right?
Epilepsy does not automatically mean daily medication, but avoiding medication should not automatically be the goal either.
Management may involve careful observation, prescribed rescue medication, daily anti-seizure medication, dietary or supportive changes, reviewing other products the dog receives, or referral to a veterinary neurologist.
A dog experiencing frequent clusters or prolonged seizures faces very different risks from a dog having brief episodes many months apart, so treatment decisions need to take the whole picture into account.
That includes:
seizure frequency, duration and severity;
how completely the dog recovers;
whether the pattern is changing or worsening;
the likely underlying cause;
possible treatment side effects;
the dog’s quality of life;
cost and practicality; and
how manageable the plan is for the household.
Medication may be lifesaving for one dog and unnecessary at that stage for another. Some dogs experience side effects such as sedation, poor coordination, increased hunger or behavioural changes, while others tolerate treatment well and achieve much better seizure control.
The aim is not simply the lowest possible seizure count.
The aim is a treatment plan that manages the risk while allowing that individual dog to live as well as possible.
Do not be afraid to seek a second opinion if the diagnosis is uncertain, an episode was poorly documented or you are uncomfortable with the proposed plan. This is particularly reasonable when long-term treatment is being considered.
Living with seizures or epilepsy affects the whole household
One part of epilepsy that is perhaps not talked about enough is what happens between the seizures.
Caregivers may worry about leaving their dog alone, sleep lightly in case another episode begins, change travel plans or find themselves watching every unusual movement and wondering whether another seizure is starting.
Treatment can add its own pressures through medication schedules, blood testing, adverse effects, emergency visits and financial costs. A plan may look successful on paper but still be too complicated, expensive or exhausting for a household to sustain, and that needs to be part of the conversation too.
A useful veterinary review should therefore consider not only how many seizures the dog has had, but whether the plan is manageable, whether the caregiver feels prepared for the next episode and which parts of caring for the dog are causing the most concern.
Have a written seizure-action plan
During a seizure, it can be difficult to remember instructions you were given weeks or months earlier. Keep a simple written plan somewhere easy to find, such as on the fridge and saved to your phone, covering what to record, when to contact your vet, when to use prescribed rescue medication and when to go straight to emergency.
A seizure diary can also help you recognise when episodes are becoming more frequent, severe or simply different from what you have seen before.
Not every future collapse is caused by epilepsy
Once a dog has an epilepsy diagnosis, there is a risk that every later collapse or unusual episode will be attributed to it.
A previous diagnosis should inform the investigation, not bring it to an end.
If an episode looks different, lasts longer, occurs during exertion, involves unusual weakness, is accompanied by pale gums or breathing changes, or leaves your dog persistently unwell, it deserves to be reassessed.
You know what is normal for your dog, so if something about an episode feels distinctly different from those you have seen before, say so.
The road ahead
Living with seizures often means learning to tolerate some uncertainty. What your dog needs after a first episode may be very different from what they need months or years later, so plans can and should change as the picture becomes clearer.
The aim is not to make every decision perfectly from day one. It is to keep reassessing what is working, what is changing and what gives your dog the best possible quality of life.
Caring for a dog with seizures is not only about managing the episodes. It is about finding a way for both of you to keep living well in between them.
Disclaimer: The information in this post is provided for educational purposes only and is not a substitute for professional veterinary advice. Always consult your veterinarian before making changes to your dog’s health plan.
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