Free Guide to Dog Seizures and What to Do

Understanding Dog Seizures: What Happens During an Episode

A seizure is a sudden burst of electrical activity in the brain that causes involuntary movements and loss of control. When a dog has a seizure, their body reacts in ways that can look frightening to pet owners. Understanding what's happening during a seizure can help you stay calm and respond appropriately.

During a seizure, a dog's brain misfires electrical signals. This causes muscles to contract and relax rapidly, often resulting in jerking or thrashing movements. Most seizures last between 30 seconds and 2 minutes, though this can feel much longer when you're watching. Some dogs may lose consciousness, while others remain partially aware of their surroundings.

There are three phases to a typical seizure. The first phase, called the aura, happens before the seizure begins. During this time, your dog may act anxious, hide, whine, or seek attention. Many dogs show the same warning signs each time. The second phase is the seizure itself, when the physical convulsions occur. The third phase, called the post-ictal period, happens after the seizure ends. During this time, your dog may seem confused, restless, or exhausted for minutes to hours afterward.

Seizures can vary greatly between dogs. Some dogs experience generalized seizures, where their entire body convulses. Others have focal seizures, where only part of the body is affected, such as one limb or one side of the face. A dog may snap their jaws, drool, lose bladder control, or defecate during a seizure. These responses are involuntary and not something your dog can prevent.

Practical takeaway: Learn to recognize the warning signs your individual dog shows before a seizure. Keep a record of when seizures occur, how long they last, and what happens before and after. This information helps your veterinarian understand your dog's seizure patterns and determine appropriate treatment options.

Common Causes of Seizures in Dogs

Seizures in dogs can have many different causes. Understanding why a seizure occurs helps determine what treatment and management approaches may work best for your pet. Some causes are temporary and treatable, while others require long-term management.

Idiopathic epilepsy is the most common cause of seizures in dogs, accounting for approximately 60% to 90% of seizure cases. Idiopathic means the cause is unknown. This type of seizure disorder is often inherited and tends to appear when dogs are between 6 months and 5 years old. Certain breeds like German Shepherds, Beagles, Labrador Retrievers, and Golden Retrievers show higher rates of idiopathic epilepsy. Dogs with this condition typically have normal brain structure and bloodwork, but their brains are prone to electrical misfires.

Secondary seizures result from an identifiable brain disease or condition. Causes include:

• Brain tumors or cancer
• Head trauma or injury
• Stroke or bleeding in the brain
• Infections like encephalitis or meningitis
• Inflammatory brain disease
• Brain malformations present from birth

Reactive seizures happen when something outside the brain triggers a seizure. These causes include:

• Poisoning from toxins like chocolate, xylitol, or pesticides
• Very low blood sugar (hypoglycemia)
• Liver failure
• Kidney failure
• Severe electrolyte imbalances
• Extreme heat (heat stroke)
• Oxygen deprivation

Age matters when considering seizure causes. Puppies and young dogs with seizures are more likely to have idiopathic epilepsy or inherited conditions. Older dogs who develop seizures suddenly are more likely to have secondary causes like brain tumors or metabolic disease. A dog with their first seizure after age seven should be evaluated thoroughly by a veterinarian to rule out serious underlying conditions.

Practical takeaway: Write down everything you know about when your dog's seizures started, how old your dog was, their breed, and any recent illnesses or injuries. Share this information with your veterinarian, as it helps narrow down possible causes and guides decisions about testing and treatment.

Immediate Actions to Take When Your Dog Is Having a Seizure

Watching your dog experience a seizure is stressful, but knowing what to do helps keep your pet safe. The most important thing is to stay calm. Your dog cannot swallow their tongue during a seizure, despite this common myth. Your dog also cannot feel pain during the seizure, though they may feel sore afterward due to muscle contractions.

During the seizure itself, your main goal is to prevent injury. Move any furniture or hard objects away from your dog if you can do so safely. Do not try to hold your dog down or restrict their movements. Do not put your hands near your dog's mouth, as they may accidentally bite you without meaning to. Do not try to give your dog water or medication during the seizure—your dog cannot swallow, and you risk injuring yourself or choking your dog.

Instead, follow these steps:

• Move yourself to a safe distance where you won't be kicked or struck
• Keep other pets and children away from the seizing dog
• Dim bright lights if possible, as light can make seizures worse
• Reduce noise and avoid talking loudly
• Stay nearby so you can monitor your dog and provide comfort once the seizure ends
• Note the exact time the seizure starts and ends
• Watch for how many limbs are involved and whether your dog loses consciousness

Once the seizure ends, your dog will be confused and disoriented. Speak in a calm, quiet voice and avoid sudden movements. Your dog may not recognize you immediately. Some dogs become aggressive or fearful during the post-ictal period due to confusion. Give your dog time and space to reorient. Offer water after a few minutes if your dog seems alert. Monitor your dog closely for several hours, as sometimes dogs have multiple seizures in a short period.

Call your veterinarian if this is your dog's first seizure, if the seizure lasts longer than 5 minutes, if your dog has multiple seizures in a short time, or if your dog seems injured or in distress. If your veterinarian has instructed you to give seizure medication at home (such as rectal diazepam), follow those instructions. Some dogs have a condition called status epilepticus, where seizures don't stop on their own or happen repeatedly. This is a medical emergency requiring immediate veterinary care.

Practical takeaway: Keep a seizure journal. Record the date, start time, duration, what your dog was doing before the seizure, and how long recovery took. This record becomes invaluable for your veterinarian when deciding on treatment. Take video if you feel comfortable doing so, as veterinarians often find recorded seizures helpful for diagnosis.

When to Seek Veterinary Care and What to Expect

Determining when your dog needs veterinary attention for seizures depends on several factors. A single brief seizure in an otherwise healthy dog may not require emergency care, but a first seizure should always be evaluated by your veterinarian within 24 hours. This initial evaluation helps rule out treatable causes and establishes a baseline for your dog's health.

Seek immediate emergency veterinary care if:

• The seizure lasts longer than 5 minutes
• Your dog has multiple seizures within a short time span (cluster seizures)
• Your dog doesn't regain consciousness after the seizure
• This is your dog's first seizure and you don't know the cause
• Your dog shows signs of injury, pain, or distress
• Your dog is very young (under 6 months) or very old (over 8 years)
• Your dog may have been exposed to poison or toxins