Health & Medical

Nothing prepares you for the first one. One moment the dog is asleep on the rug, the next it is rigid, paddling, jaw clamping, urine on the floor, eyes open but nobody home. It lasts ninety seconds and feels like twenty minutes.

Almost every owner who witnesses this believes their dog is dying. Most of the time it is not, and knowing what to do turns a terrifying event into a manageable one.

The three phases

Seizures usually follow a pattern. Before the event, in the pre-ictal phase, dogs often behave oddly for minutes or hours: clingy, restless, hiding, pacing, whining, or staring. Owners frequently learn to recognise this and can predict an episode.

The seizure itself, the ictal phase, most commonly presents as a generalised tonic-clonic event. The dog falls, stiffens, then paddles or jerks the limbs. There is often champing of the jaw, drooling, vocalising, and loss of bladder or bowel control. The dog is unconscious throughout and is not in pain, however distressing it looks. Typical duration is thirty seconds to two minutes.

Focal seizures look different and are easily missed. Twitching on one side of the face, a repetitive chewing motion, a limb jerking, or sudden staring and unresponsiveness. Some dogs snap at invisible flies. These can progress to generalised seizures.

Afterwards comes the post-ictal phase, and this is the part that alarms owners almost as much as the seizure. The dog may be disoriented, blind temporarily, unsteady, pacing, ravenously hungry or unusually thirsty. It can last minutes or many hours. It passes.

What to do while it is happening

Do not put your hands near the mouth. The old myth about a dog swallowing its tongue is false, and jaw muscles clamp with enormous force during a seizure. Serious bites happen this way, and the dog has no awareness or control.

Instead, move furniture away and slide the dog gently from anywhere dangerous, especially stairs. Put a cushion near the head if you can do so safely. Dim the lights, turn off the television, and keep the house quiet. Ask other pets and children to leave the room.

Then look at the clock. Time it. Owners consistently overestimate seizure length by a factor of five, and duration is the single most important piece of information your vet needs.

If you can, film it. A video is enormously more useful than a description, and it helps distinguish a true seizure from fainting, vestibular disease or a collapse episode, which are treated very differently.

After it stops, speak quietly, stay nearby but do not crowd, and let the dog recover. Offer water once it is properly aware, and food a little after. Do not attempt to walk it or drive it anywhere until it is steady, unless the situation demands it.

When it becomes an emergency

Get to a vet immediately in these situations. A single seizure lasting more than five minutes, called status epilepticus, is a genuine emergency and can cause brain damage and dangerous overheating. Two or more seizures in 24 hours, known as cluster seizures, needs same-day veterinary attention. Any seizure in a dog that has never had one before warrants prompt assessment. A dog that does not regain consciousness between events, or that has a seizure alongside a known toxin exposure, needs emergency care.

For a dog with diagnosed epilepsy having a typical isolated seizure that resolves in under two minutes, a call to the practice and a note in the diary is usually the right response rather than a midnight dash.

Where seizures come from

Causes divide roughly into three groups.

Idiopathic epilepsy is the most common diagnosis in dogs aged six months to six years. It means no underlying cause is found and the brain itself appears structurally normal. There is a strong genetic component, and Border Collies, Labradors, Beagles, German Shepherds, Golden Retrievers and Belgian Shepherds appear frequently. It is a diagnosis of exclusion.

Structural brain disease includes tumours, inflammation such as encephalitis, strokes, head trauma and hydrocephalus. A dog having its first seizure over the age of about six is statistically more likely to fall into this group, which is why older dogs usually get more extensive investigation including MRI.

Metabolic and toxic causes come from outside the brain: low blood sugar, liver shunts or liver failure, kidney disease, low calcium, and poisoning. Common toxins include xylitol, certain permethrin flea products applied to dogs and then contacting cats, slug bait containing metaldehyde, chocolate in quantity, and some recreational drugs. Always tell your vet what the dog might have accessed, without embarrassment.

Diagnosis and treatment

Investigation usually begins with a full physical and neurological examination, bloodwork including glucose, liver and kidney values and electrolytes, and often bile acid testing for liver shunts. Blood pressure and infectious disease testing may follow. If those are clear and the dog is young, many vets will treat presumptively for idiopathic epilepsy. MRI and cerebrospinal fluid analysis at a referral centre give the definitive answer and are recommended for older dogs, focal seizures, abnormal neurological findings, or poor response to treatment.

Not every epileptic dog needs medication. Treatment is usually started when seizures occur more often than roughly once every four to six weeks, when clusters occur, when any seizure is prolonged, or when the post-ictal period is severe.

Phenobarbital and potassium bromide are long-established options and remain effective, with phenobarbital requiring periodic blood level and liver monitoring. Levetiracetam has become popular for its safety profile and is often added on. Imepitoin is licensed for canine epilepsy in some regions and suits milder cases. Some owners are given rectal or intranasal diazepam or midazolam to use at home during clusters, which can prevent emergency visits.

The realistic goal is control, not cure. A good outcome is a substantial reduction in frequency and severity, not zero seizures forever, and about two thirds of dogs achieve reasonable control.

Living with it

Keep a seizure diary with date, time, duration, description and anything unusual that day. Patterns emerge, and this record drives every treatment decision.

Give medication at the same times every day without fail, because fluctuating blood levels trigger seizures. Never stop anticonvulsants abruptly.

Practical safety adjustments help: avoid unsupervised swimming, use stair gates, and be careful with high furniture. Many owners find that consistent routine, decent sleep and reduced household stress lower the frequency, and a medium-chain triglyceride enriched diet has some supporting evidence as an adjunct.

Most epileptic dogs live full, normal lives between episodes. They play, they walk, they are exactly the dog they always were. The seizures are frightening to watch, but they are usually only a small fraction of a good life.