Seizures in Dogs

Bluegrass Veterinary Specialists + Animal Emergency sees a number of different types of seizures in dogs which can range in severity from virtually undetectable to incredibly severe. In this blog, our Lexington vets explain different types of seizures your dog could have and what you should do if your dog has a seizure.

Seizures in Dogs

Our Rock Hill vets often diagnose seizures in dogs, but the type of seizure an individual dog may have, and how these different types can affect your dog can be very different.

While there are different categorizations of seizures your dog may experience, it is not unusual for an individual dog to experience more than one type of seizure, and it may surprise you to know that not all seizures necessarily involve convulsions.

In dogs, seizures typically happen suddenly, without warning, and last just a brief period of time (a few seconds to a couple of minutes).

If your dog has a seizure, remain calm and try to keep in mind that most dogs having a seizure do not hurt themselves and often do not require a trip to the vet. Nonetheless, if your dog has a short seizure lasting less than 2 minutes call your primary care vet, just to let them know what has happened.

Focal (Partial) Seizures 

Focal or Partial Seizures only affect a particular region of one-half of your dog's brain. These seizures will be described as either simple or complex, based on your dog’s level of awareness during the seizure. While many dogs remain conscious during a simple focal seizure, consciousness is often impaired during a complex focal seizure.

Signs of Focal Seizures in Dogs

If your dog is experiencing a simple focal seizure you may notice one or more of the following symptoms:

Generalized Seizures

Generalized seizures occur across both sides of your dog's brain. If your dog is experiencing a generalized seizure they are likely to lose consciousness, and urination or defecation could occur.

What are the signs and symptoms of generalized seizures in dogs?

These seizures are characterized by movement on both sides of the body and fall into different categories:

• Tonic: Muscle contraction or stiffening that can last from seconds to minutes
• Clonic: Involuntary rapid and rhythmic jerking or muscle contractions
• Tonic-Clonic: Tonic phase followed immediately by a clonic phase
• Myoclonic: Sporadic jerks or movements typically on both sides of the body
• Atonic (drop attacks, non-convulsive seizures): A sudden loss of muscle tone causes the dog to collapse

Seizures can also occur in different ways. Many dogs will experience a single unexplained 'one-off' seizure during their lifetime, however other dogs can experience multiple or extended seizures.

• Cluster Seizures: Two or more seizures within a 24-hour period with the dog regaining full consciousness between seizures
• Status Epilepticus: Either (a) a single seizure lasting longer than 5 minutes, or (b) a number of seizures over a short period of time without regaining full consciousness between each seizure. If your dog suffers from a Status Epilepticus seizure call your vet immediately for advice. Seizures lasting longer than 5 minutes can be life-threatening.

Can a focal seizure evolve into a generalized seizure?

A focal seizure that goes on to evolve into a generalized seizure is very commonly seen in dogs. Often times the focal seizure is so short or subtle that the signs can be missed by even the most attentive pet parents. If your dog begins having a generalized seizure, try to think back to exactly what your dog was doing before it began, and let your vet know when you speak to them. A full understanding of what your dog was doing before the generalized seizure began can help your vet to diagnose the type of seizure your dog has had and what the possible cause may be.