How to Time a Seizure in a Dog

A seizure is a measurement problem before it is anything else. The clinical response depends heavily on how long the event actually lasts — and owners, understandably, almost always get the number wrong. A thirty-second seizure and a five-minute seizure are two very different clinical situations, and your watch is often the only thing that separates them.

This guide is narrower than a general seizure diary. It’s specifically about how to time a seizure accurately enough to be useful, and where the duration thresholds fall that change what your veterinarian does next.

Why owners misjudge seizure length

During a seizure, time stretches. A ninety-second event can feel like five minutes, and a three-minute event can feel like ten. There are a few reasons this happens:

Attention narrows. You’re focused on keeping your dog safe, not the clock.
Adrenaline distorts perception. This is a well-documented effect in any high-stress witnessed event.
There’s no natural start marker. You realize something is happening a few seconds after it began, and the clock in your head often started earlier than the one on the wall.
The recovery period feels like part of the seizure. Post-ictal disorientation can last minutes or hours, and it’s easy to mentally include it in the duration.

The result is that estimated durations from memory are usually too long and rarely consistent across events. An accurate number on a clock is worth more than a careful description written afterward.

Why accurate timing matters clinically

Duration is one of the primary clinical inputs into how seriously an event is taken.

A seizure lasting less than about two minutes is the most common pattern for a generalized tonic-clonic event in an otherwise healthy dog. It’s still worth documenting and reporting, but it’s generally not an immediate emergency in a dog with no other concerning signs.
A seizure approaching or exceeding five minutes is considered status epilepticus — a life-threatening neurological emergency that can cause brain injury, hyperthermia, and metabolic derangement if not interrupted. This is an immediate emergency hospital situation.
More than one seizure in 24 hours (cluster seizures) is also treated as urgent even if each individual event is short, because the pattern itself is concerning.

Consensus guidance from the American College of Veterinary Internal Medicine on status epilepticus and cluster seizures is the standard reference here, and the five-minute threshold appears across essentially every reputable veterinary neurology source.

The clinical point is simple: the difference between a seizure you mention at your next visit and a seizure you drive to the emergency hospital for is often thirty to sixty seconds of duration. That means getting the number right is not optional.

What counts as the start and end

Before you can time something accurately, you need to know what you’re timing. Two places people get confused:

Start time. The clock starts when the ictal phase (the actual seizure activity) begins — typically a sudden loss of posture, whole-body rigidity, jerking movements, unresponsiveness, or repetitive involuntary movement. It does not start at the pre-seizure phase (sometimes called the “aura”), where the dog may seem anxious, clingy, restless, or confused just before. Those pre-ictal signs are worth noting separately but are not part of the seizure duration.

End time. The clock stops when active seizure movement ends — the body stops convulsing or jerking, and the dog goes limp or begins trying to right themselves. It does not stop when the dog is “back to normal.” The post-ictal recovery phase that follows — disorientation, wobbliness, hunger, temporary blindness — is clinically important, but it’s tracked separately from the ictal duration. Recording both lets your vet see the real shape of the event.

How to actually time a seizure

The goal is to get an objective number, not a feel. A few practical setups:

Start a phone timer the moment you realize what’s happening. A stopwatch app is ideal because it gives you a running display you can glance at. If you have a smart speaker in the room, “Alexa, start a timer” or “Hey Google, start a timer” works hands-free. Note the time you started the timer as well so you know your reference point.

Record video from the start. A video clip timestamps itself. Even if you forget the exact clock time, the file metadata and the clip length give you precise timing after the fact. Video also serves the separate purpose described in the seizure diary guide — helping your vet distinguish a true seizure from other events that can look similar.

If you’re alone, prioritize in this order.

Protect the dog from self-injury (move furniture, clear hard edges).
Start a video or a timer — whichever is faster. On most phones the camera is one tap from the lock screen.
Watch the clock. Call out the time to yourself aloud; you’ll remember it more reliably.

If someone else is home, split the roles. One person with the dog, one person with the phone. Agree in advance who does what so the first seconds aren’t spent coordinating.

A practical setup to put in place now

If your dog has had a seizure before, it is very worth setting yourself up to time the next one before it happens.

Keep your phone charged and within reach at night. Many seizures occur during sleep or just after waking.
Know where the nearest 24-hour emergency veterinary hospital is. Save the phone number.
Put a pen and notepad — or a pinned notes app — somewhere obvious. Write down the clock time, duration, and a one-line description while it’s fresh.
If you live with someone else, have a brief conversation about role split. It is much easier to agree in advance than during an event.
Keep your phone’s video recording accessible. On iPhone, this is the left swipe from the lock screen; on Android, most phones allow a double-tap of the power button for camera. Test it.

What to do once the seizure ends

After active seizure activity stops:

Note the end time immediately. Don’t wait until the dog is recovered.
Stay with your dog. They may be disoriented and unstable on their feet for minutes to hours.
Do not put your hands in or near their mouth. Dogs do not swallow their tongues; there is no benefit, and there is real risk of being bitten during the post-ictal phase.
Keep lights dim and the environment quiet. Loud stimuli can prolong the recovery phase in some dogs.
Once the dog is settled and you have a moment, write down: start time, end time, total duration, what they were doing before the seizure, and what the post-ictal recovery looked like.

When to go to the emergency hospital

Contact or go directly to an emergency veterinary hospital when:

A seizure lasts more than five minutes.
Two or more seizures occur within 24 hours.
Your dog has not recovered between events.
Your dog is having a seizure and is a known diabetic, has a known heart condition, is pregnant, or is very young or geriatric.
The event was accompanied by serious injury (falling down stairs, impact with a hard surface, choking).
You are not sure.

The last one matters. “I’m not sure” is a legitimate reason to call — veterinary emergency staff would much rather help you triage by phone than have you wait at home trying to decide.

Where Vetara fits in

Timing is one of the most useful numbers in your dog’s health record, and it’s also one of the easiest to lose. Vetara captures event timestamps automatically, keeps video and notes attached to the same entry, and puts the duration next to medication history, recent doses, and the rest of the clinical context your vet will want to see. When the next seizure happens weeks later, you’re not guessing whether it was longer this time — you can compare two precisely logged events side by side.