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Why does my dog have seizures?
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Why does my dog have seizures?

Henry Whitefield Written by Henry Whitefield Level 3 Diploma in Canine Nutrition | RVC CPD - Osteoarthritis Management
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    Watching your dog have a seizure can be one of the most frightening experiences as a pet owner. The sudden onset of uncontrolled movements, loss of consciousness, and complete helplessness you feel in that moment is genuinely terrifying. However, understanding what's happening and knowing how to respond can help you provide the best support for your dog whilst ensuring their safety.

    Seizures are actually quite common in dogs, affecting dogs at some point in their lives. They're a symptom rather than a condition in themselves, caused by abnormal electrical activity in the brain. Whilst they look alarming, many dogs with seizures go on to live perfectly normal, happy lives with appropriate veterinary care and management.

    The key is recognising what you're seeing, understanding when to seek help, and learning how to keep your dog safe during an episode. Let's explore what causes seizures in dogs and how you can best support your four-legged friend.

    What Actually Happens During a Seizure

    A seizure occurs when there's abnormal electrical activity in your dog's brain, similar to a power surge in your home's electrical system. This disrupts normal brain function and causes the uncontrolled movements and behaviours you observe.

    Most seizures in dogs are generalised, meaning they affect the entire brain and cause full-body symptoms. Your dog might suddenly collapse, paddle their legs as if swimming, drool excessively, or lose control of their bladder and bowels. They'll be unconscious during this time and won't respond to your voice.

    However, not all seizures look the same. Some dogs experience focal seizures that only affect part of the brain, causing symptoms like repeated twitching of an eyelid or lip, or strange behaviours like snapping at invisible flies. These partial seizures are much less dramatic but equally important to recognise.

    Understanding the Different Types of Seizures

    Generalised Seizures

    These are the classic seizures most people recognise. Your dog will lose consciousness and experience violent, jerking movements throughout their body. They might paddle their legs, foam at the mouth, and lose control of their bladder or bowels. These episodes typically last between one and three minutes.

    During a generalised seizure, your dog is completely unaware of their surroundings and won't respond to your voice or touch. The movements are involuntary and your dog has no control over what's happening.

    Focal or Partial Seizures

    These affect only part of the brain and cause much subtler symptoms. You might notice repeated twitching in your dog's face, ear, or leg, or unusual behaviours like excessive drooling from one side of the mouth.

    Some dogs develop what's called "fly-biting" behaviour, where they repeatedly snap at the air as if catching invisible insects. Others might show repetitive jaw movements that look like they're chewing gum. Your dog usually remains conscious during focal seizures.

    Psychomotor Seizures

    These involve strange, repetitive behaviours that last just a few minutes. Your dog might suddenly start attacking an imaginary object, chase their tail obsessively, or perform the same unusual action repeatedly. The key characteristic is that they'll do exactly the same thing every time they have this type of seizure.

    Recognising seizure severity levels

    Mild

    Focal Seizures

    Twitching in one area, unusual behaviours, dog usually remains conscious. Monitor and contact vet for advice.

    Moderate

    Generalised Seizures

    Full-body convulsions lasting 1-3 minutes. Time the episode and contact vet after it ends.

    Emergency

    Status Epilepticus

    Seizures lasting over 5 minutes or multiple seizures without recovery. Seek immediate emergency care.

    What Causes Seizures in Dogs

    Idiopathic Epilepsy

    The most common cause of seizures in dogs is idiopathic epilepsy, which essentially means seizures with no identifiable underlying cause. This condition typically develops between six months and six years of age and appears to have a genetic component.

    Certain breeds are more prone to idiopathic epilepsy, including Border Collies, Labrador Retrievers, German Shepherds, Golden Retrievers, and Beagles. If your dog belongs to one of these breeds and develops seizures in this age range, idiopathic epilepsy is often the likely diagnosis.

    Metabolic Disorders

    Sometimes seizures occur because something in your dog's body chemistry is out of balance. Low blood sugar, particularly in small or diabetic dogs, can trigger seizures. Liver disease, kidney problems, or imbalances in calcium levels can also cause episodes.

    The good news about metabolic seizures is that they often resolve once the underlying condition is managed. If your dog's liver function improves or their blood sugar stabilises, the seizures typically stop.

    Toxic Substances

    Various household items and foods can poison dogs and cause seizures. Dark chocolate, xylitol (artificial sweetener), antifreeze, and certain rat poisons are particularly dangerous. Even small amounts of these substances can lower your dog's seizure threshold and trigger an episode.

    If you suspect your dog has ingested something toxic and they're having seizures, this constitutes an emergency requiring immediate veterinary attention.

    Structural Brain Problems

    Brain tumours, head injuries, infections, or inflammatory diseases can cause seizures by directly affecting brain tissue. These structural causes are more common in older dogs experiencing their first seizure after age six.

    Dogs with structural brain problems often show other neurological symptoms alongside seizures, such as changes in behaviour, difficulty walking, or vision problems. If you notice your dog acting drunk or wobbly, this could indicate neurological issues that warrant veterinary investigation.

    Recognising the Warning Signs

    Before a Seizure

    Many dogs show subtle changes in behaviour before a seizure begins. You might notice your dog becoming restless, anxious, or clingy. They may pace, whine, drool excessively, or seek out hiding spots.

    Learning to recognise these early warning signs can help you prepare and ensure your dog is in a safe location when the seizure begins. Some owners find that gentle techniques during this phase can help reduce seizure severity, though it's worth discussing these with your vet.

    During the Seizure

    The seizure itself typically involves uncontrolled movements, loss of consciousness, and various physical symptoms. Your dog might paddle their legs, drool or foam at the mouth, and lose control of their bladder or bowels. Their body may stiffen or they might experience violent jerking movements.

    It's crucial to time the seizure from start to finish, as this information helps your vet assess the severity and determine appropriate management.

    After the Seizure

    The recovery period, called the post-ictal phase, can last anywhere from minutes to hours. Your dog may seem disoriented, confused, or temporarily blind. They might walk in circles, bump into furniture, or appear not to recognise you.

    During this time, your dog may also be unusually thirsty, restless, or even show aggressive behaviour due to confusion. This is temporary and your dog will gradually return to normal.

    How to Keep Your Dog Safe During a Seizure

    Stay Calm and Create Safety

    Your first priority is keeping both you and your dog safe. Remove any breakable objects nearby and gently move your dog away from stairs or furniture by pulling on their hind legs or sliding a blanket underneath them.

    Never put your hands near your dog's mouth during a seizure. They cannot swallow their tongue, but they might accidentally bite you. Avoid touching or restraining them during the episode, as this won't help and could result in injury.

    What You Should Do

    Time the seizure using your phone's stopwatch feature. If possible, ask someone to video the episode to show your vet later. Speak to your dog in calm, reassuring tones, but avoid physical contact until the seizure ends.

    If the seizure lasts more than a couple of minutes, turn on a fan and place cool, damp towels on your dog's paws to prevent overheating. Dogs can develop dangerously high body temperatures during prolonged seizures.

    When to Seek Veterinary Care

    Emergency Situations

    Contact your emergency vet immediately if a seizure lasts more than five minutes, if your dog has multiple seizures without regaining consciousness between them, or if they're having difficulty breathing. These situations can cause permanent brain damage and require urgent medical intervention.

    Emergency care typically involves intravenous medications to stop the seizure and supportive care to manage body temperature and breathing.

    Non-Emergency Veterinary Consultation

    Schedule a veterinary appointment after any first seizure, even if it was brief. Your vet needs to examine your dog and potentially run tests to determine the underlying cause.

    Also contact your vet if seizures become more frequent, last longer, or if you notice changes in the pattern of your dog's seizures. Dogs having more than one seizure per month typically benefit from medication.

    Diagnosis and Management Options

    Veterinary Investigation

    Your vet will conduct a thorough physical examination and ask detailed questions about your dog's health history, recent activities, and what you observed during the seizure. They may recommend blood tests to check for metabolic disorders, liver or kidney problems, or toxin exposure.

    In some cases, advanced imaging like CT scans or MRI might be necessary to rule out brain tumours or other structural problems. The diagnostic process helps determine whether management is needed and what type would be most effective.

    Medication Decisions

    Not every dog who has a seizure needs medication. If your dog has only had one episode, your vet may recommend monitoring rather than starting medication immediately, as they might never have another seizure.

    Medication is typically recommended for dogs having more than one seizure per month, those experiencing cluster seizures, or dogs whose seizures significantly impact their quality of life. Common medications include phenobarbital and levetiracetam, which help support brain stability.

    Managing Life with a Seizure-Prone Dog

    Keeping a Seizure Diary

    If your dog has ongoing seizures, maintaining detailed records helps your vet assess medication effectiveness. Note the date, time, duration, and description of each seizure, along with what your dog was doing beforehand and how they behaved afterward.

    Look for patterns or potential triggers like stress, fatigue, or specific activities. Some dogs have seizures more frequently during thunderstorms or fireworks, whilst others might be triggered by excitement or changes in routine.

    Home Management Strategies

    Your vet may provide emergency medications like rectal diazepam for use during prolonged seizures at home. Learning to administer these safely can prevent the need for emergency veterinary visits in some situations.

    Creating a calm, predictable environment helps many dogs with epilepsy. Try to maintain consistent routines for feeding, exercise, and sleep, and minimise stressful situations where possible.

    Long-term Outlook and Quality of Life

    Most dogs with well-managed epilepsy live normal, happy lives. With appropriate medication, many dogs experience significantly fewer seizures or may go months between episodes. The key is working closely with your vet to find the right management approach for your individual dog.

    Some dogs may need adjustments to their medication over time, and a small percentage develop tolerance requiring additional drugs. However, the majority of epileptic dogs maintain excellent quality of life with proper management.

    Regular veterinary monitoring ensures your dog's care remains effective and allows for early detection of any medication side effects. Blood tests may be needed periodically to check liver function and drug levels. Additionally, maintaining your dog's overall health through proper nutrition and supplements like MedPaw's hip and joint supplement can support their general wellbeing during ongoing management.

    Remember that seizures, whilst frightening to witness, are often manageable conditions. With your vet's guidance, proper medication when needed, and your loving care, dogs with epilepsy can continue to enjoy all their favourite activities and maintain strong bonds with their families.

    Should I put something in my dog's mouth during a seizure to stop them swallowing their tongue?

    No, never put anything in your dog's mouth during a seizure. Dogs cannot actually swallow their tongues, and putting your fingers or objects in their mouth could result in serious injury to both of you. Instead, keep your hands away from their head and focus on timing the seizure and keeping them safe from nearby hazards.

    How long do dog seizures typically last and when should I be worried?

    Most dog seizures last between one and three minutes. You should seek emergency veterinary care immediately if a seizure lasts longer than five minutes, if your dog has multiple seizures without recovering between them, or if they have difficulty breathing. Any first seizure warrants a veterinary consultation, even if it was brief.

    Can certain dog breeds be more prone to seizures than others?

    Yes, some breeds are genetically predisposed to idiopathic epilepsy, including Border Collies, Labrador Retrievers, German Shepherds, Golden Retrievers, and Beagles. This type of epilepsy typically develops between six months and six years of age. However, seizures can affect any dog regardless of breed, and the underlying cause varies significantly.

    What should I do immediately after my dog has finished having a seizure?

    After a seizure ends, give your dog space and speak to them calmly whilst they recover. They may be disoriented, confused, or temporarily blind for minutes to hours afterward. Avoid touching them initially as they might react unpredictably due to confusion. Contact your vet to discuss the episode, especially if this was their first seizure.

    Could my dog's joint supplements affect their seizures in any way?

    Quality joint supplements are generally considered safe for dogs with seizures, but you should always discuss any supplements with your vet, especially if your dog is on seizure medication. Your vet can advise whether the supplement ingredients might interact with any prescribed medications and ensure the supplement supports your dog's overall health plan.

    Important health information: This article is for general information only and isn't a substitute for professional veterinary advice. If you're worried about your dog's health or mobility, please contact your vet.

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