Seizures in Horses: Emergency Safety, Causes and Ongoing Care
In this article
By Dr Duncan Houston
A horse collapsing and convulsing is frightening, and the instinct to rush in is understandable. Your first job is to prevent people from being injured while urgent veterinary help is arranged.
Seizures have several possible causes. One episode does not automatically mean lifelong epilepsy, and recovery afterwards does not mean the event can be ignored.
Quick Answer
Call your equine vet immediately after a suspected seizure and keep people and other animals clear. Do not restrain the horse, hold its head or put anything in its mouth. A seizure lasting around five minutes, repeated seizures without recovery, or persistent severe abnormalities are critical emergencies, but do not wait for that threshold before calling.
What can a seizure look like?
A generalised seizure may involve collapse, stiffening, paddling limbs, loss of awareness and involuntary urination or defecation. Focal seizures can cause more localised twitching or unusual repetitive behaviour, sometimes with altered awareness.
Afterwards, a horse may be confused, unsteady or temporarily appear unable to see normally. This recovery period can be dangerous even after the convulsions stop. Give space and let your vet direct handling.
The MSD nervous-system overview places seizures alongside other neurological signs that require investigation.
What causes seizures?
Head trauma, brain inflammation or infection, toxins and metabolic disturbances such as low blood glucose or severe liver disease are possibilities. Age and exposure history matter. Newborn foals have different concerns from adult horses, including systemic illness and neonatal encephalopathy.
Some horses have a recurrent seizure disorder without an identified structural cause, but this is a diagnosis reached after appropriate investigation. Do not assume a seizuring Arabian foal will simply outgrow the problem without treatment.
How urgent is it?
| Situation | Action |
|---|---|
| First suspected seizure, now apparently recovered | Call your vet immediately and suspend riding and driving. |
| Ongoing confusion, weakness, fever or injury | Urgent in-person assessment. |
| Prolonged seizure or repeated episodes without recovery | Critical emergency; keep the area clear while help is arranged. |
What else could look similar?
Fainting, sleep-related collapse, severe colic, muscle tremors and loss of balance can resemble parts of a seizure. A safely recorded video and a precise timeline are valuable. Do not recreate a triggering situation to obtain footage.
Your vet assesses the history, physical and neurological examination and blood tests. Depending on findings, infectious testing, cerebrospinal fluid analysis, imaging or an EEG may be considered. The MSD neurological checkup guidance explains these tools.
When is this an emergency?
Every first seizure warrants an immediate veterinary call. A prolonged event, repeated episodes, difficulty breathing, serious trauma or failure to recover normally makes the situation especially critical. The MSD anticonvulsant reference defines status epilepticus using prolonged seizure activity or incomplete recovery between events.
What should you do right now?
- Keep everyone outside kicking and striking range. Move other animals away if safe.
- Call the vet and time the episode from a distance.
- Reduce noise and visual stimulation without approaching the horse.
- Do not hold the tongue, place objects in the mouth or attempt oral medication.
- Afterwards, keep the surroundings quiet and await instructions about water, feed, handling and transport.
Do not try to pad the head while limbs are moving. If environmental hazards cannot be removed safely, explain their location to the vet. Avoid saliva contact and use caution around unexplained neurological disease.
Longer-term treatment and safety
Emergency medication and treatment of the cause are veterinary decisions. Recurrent seizures may require ongoing medication and blood monitoring. Do not stop anticonvulsants abruptly when the horse seems better.
Keep a log of dates, duration, circumstances, recovery and medication. Housing may need modification to reduce injury risk. Riding and driving decisions require an individual veterinary risk assessment; there is no universal six-month rule that makes every horse safe.
Common mistakes
- Trying to restrain a convulsing horse.
- Waiting for another episode before seeking help.
- Calling every collapse epilepsy.
- Giving oral medication before swallowing and awareness are normal.
- Stopping prescribed treatment without a plan.
Prevention where possible
Maintain regionally appropriate vaccination, safe fencing, toxin control and careful medication storage. Consistent routines help observation and handling, but cannot prevent all neurological disease. Share the emergency plan with every carer.
Frequently asked questions
Can a horse swallow its tongue?
No. Putting your hand in the mouth creates serious danger.
Does one seizure mean epilepsy?
No. Several acute illnesses and injuries can cause seizures.
Can I ride after the horse recovers?
Do not resume until the cause and safety implications have been assessed.
Will a foal outgrow seizures?
Some specific syndromes improve, but urgent assessment is essential before predicting that outcome.
Keep people safe, call early and document what happened. Diagnosis and a clear safety plan guide the next decisions.
For help understanding your horse’s care and preparing questions for your veterinarian, visit ASK A VET™. Urgent signs need an equine veterinarian in person.
