Watching your dog have a seizure is one of the most frightening moments of pet ownership — and one where knowing what to do genuinely matters. This guide covers the main causes, what a seizure actually looks like, the do's and don'ts in the moment, and the situations that mean "emergency vet, now." One thing upfront: any first seizure deserves a veterinary workup. This article helps you understand and respond — it does not replace that visit.
What causes seizures in dogs?
- Idiopathic epilepsy — the most common cause, typically appearing between 6 months and 6 years, with a genetic component in breeds like Border Collies, Beagles, Labs and Australian Shepherds. "Idiopathic" means no underlying lesion is found.
- Toxins — xylitol (sugar-free gum), chocolate, snail bait, certain human medications, and some essential oils can all trigger seizures in otherwise healthy dogs.
- Metabolic causes — low blood sugar (especially toy breeds and diabetic dogs on insulin), liver disease, kidney failure, electrolyte imbalances.
- Structural causes — head trauma, inflammation (encephalitis), and in older dogs, brain tumors — a first seizure after age 6–7 raises this concern and warrants imaging conversations with your vet.
- Heatstroke — severe overheating can end in seizures; flat-faced breeds are highest risk.
What a seizure looks like (and what it doesn't)
The classic generalized seizure: the dog stiffens, falls to their side, paddles their legs, may vocalize, drool, or lose bladder control, usually for 30 seconds to 2 minutes. Many dogs show a pre-ictal phase (restlessness, clinginess, staring) minutes to hours before, and a post-ictal phase after — disorientation, pacing, temporary blindness, ravenous hunger — lasting minutes to hours. Focal seizures are subtler: fly-biting at nothing, rhythmic facial twitching, one limb jerking. Not everything that twitches is a seizure — dreaming dogs paddle too — the difference is that dreaming dogs wake when called.
What to do during a seizure
- Stay calm and time it. Look at a clock — seizure length drives medical decisions.
- Clear the area. Move furniture away; slide a cushion under the head if easy.
- Do NOT touch the mouth. Dogs can't swallow their tongues; you can get badly bitten.
- Dim and quiet the room. Light and noise can prolong the event.
- Film it if a second person is present — video is gold for your vet.
- Afterward: keep them confined and calm through the post-ictal fog; offer water once fully alert.
When it's an emergency
- A seizure lasting more than 5 minutes (status epilepticus — go now)
- Multiple seizures in 24 hours (cluster seizures)
- First seizure in a dog with known toxin exposure
- Seizure during heat or after head trauma
- Difficulty breathing or failure to regain consciousness
Living with a seizure-prone dog
Many epileptic dogs live full, happy lives on well-managed medication (phenobarbital, levetiracetam and others), with regular blood monitoring. Owners often keep a seizure diary — date, length, video, possible triggers — which makes dose adjustments far more precise. Routine matters: consistent sleep, regular meals, and avoiding known stress spikes all help reduce trigger load, and overall wellness fundamentals — healthy weight, good gut health, steady routine (see our pet parent wellness checklist) — support a dog managing any chronic condition. Never add supplements or change diet for a seizure-prone dog without your vet's sign-off — several common supplements interact with seizure medications.
This article is informational only and is not veterinary advice. A first seizure always warrants a veterinary exam; a seizure over 5 minutes is a life-threatening emergency.