Watching your dog having a seizure is a scary thing.
I remember how helpless I felt when Roxy had her first seizure, She had a full-blown one; she was unresponsive, laying on her side, her whole body was convulsing and foam was coming out of her mouth …
What is a seizure?
A seizure is abnormal electrical activity in the brain. Technically, then, a seizure is not a symptom; the resulting convulsions or other related disturbances are.
The outward manifestation can vary in severity. Signs can include:
- loss of consciousness/awareness
- contractions/convulsions
- unresponsiveness
- involuntary urination, defecation, or salivation
- behavior changes such as pacing, running in circles, aggression, not recognizing the owner
Could you confuse seizures with syncope (fainting)? In both cases, a dog can lose consciousness. However, if there are signs of convulsive activity it is more likely to be a seizure.
Tonic-Clonic Generalized Seizures (previously known as Grand mal seizures)
The scariest and most common are grand mal seizures. These seizures have tonic (increased muscle tone) and clonic (rhythmic muscle contraction) phases.
There is a loss of consciousness and sometimes urination and defecation. That what Roxy had. She lost consciousness and was convulsing. It didn’t last very long but it seems like forever before it passed. There is no way you wouldn’t recognize a grand mal seizure if you saw one. Though I’ve seen people worried about a potential seizure while the dog was just chasing bunnies in their sleep.
All of my dogs sometimes chase(d) bunnies in their sleep. When Roxy did have a seizure I had no doubt as to what I was looking at. The main difference is that if your dog is dreaming about chasing things, you CAN wake them up from THAT.
Petit mal seizures
Petit mal (focal seizures) can be trickier to recognize. They involve only a part of the brain and can result in:
- abnormal contractions of just some muscles or individual limbs
- unusual movements
- changes or unusual behaviors such as snapping at invisible objects.
Therefore a focal seizure might go unrecognized as such.
Warning stage
The pre-seizure phase also referred to as aura, can last anywhere between a few seconds and few hours. The aura is actually a partial onset of the seizure during which unusual behavior or mentation may be seen. Your dog might be whining, hiding, shaking, drooling, seeking attention … These behaviors can have many other causes. Unless you already know your dog is suffering from seizures, you might not suspect that an upcoming seizure is imminent. If you know that your dog does have a seizure disorder, this will warn you that one is coming.
Seizures are not painful
No matter how violent the seizure might look, your dog might experience confusion or panic but not pain. Although repeated, intense muscle contractions during a seizure can become sore after the fact.
If your dog is having a seizure, the most important thing you can do is to prevent falls or injury.
A seizure shouldn’t last longer than from a few seconds to up to 2-3 minutes. If it does last longer, or your dog is experiencing multiple seizures, that can be a life-threatening situation. In such a case, your dog needs immediate emergency medical care.
After the seizure, there is usually a post-ictal period which can last from minutes to days. During this time your dog may appear dazed, disoriented or exhibit abnormal behaviors such as aggression.
Is it an emergency?
Here is the thing. I consider every first-time seizure to be an emergency. Here is why. Firstly, I wouldn’t know what caused it. Secondly, I wouldn’t know what else is coming.
Even if a seizure that falls within the 5-minute timeframe isn’t life-threatening in itself, its cause might be.
Causes of seizures or convulsions in dogs can include:
- a head injury
- brain inflammation
- poisoning
- liver failure
- dangerously low or high blood sugar
- kidney failure
- anemia
- severe electrolyte imbalance
- certain infections
- cancer
I’d want to make sure none of these things are the case.
Other symptoms of the above conditions include:
Head injury/trauma
- lethargy
- loss of consciousness
- confusion or disorientation
- ataxia, coordination problems
- bleeding from the ears or nose
- abnormal eye movements
- rigid or flaccid limbs
- differences in pupil size
Brain inflammation
- fever
- unequal pupil size or small pupils
- depression
- reduced responsiveness
- disorientation
- weakness
- loss of balance
- ataxia
- circling
- tremors
- head tilt
- facial paralysis
Poisoning
Symptoms of poisoning vary widely depending on the poison but can include:
- gastrointestinal signs such as vomiting and diarrhea
- excessive drooling
- neurological signs
- bleeding
- pale gums
- difficulty breathing
- unexplained bruising
- behavioral changes
Liver failure
- vomiting
- diarrhea
- loss of appetite
- increased thirst and urination
- jaundice
- weakness
- bleeding
- confusion
- lethargy
- unexplained bruising
High blood sugar (hyperglycemia)
- increased thirst and urination
- excessive hunger
- depression
- dehydration
- slow wound healing
- weight changes
- cataracts
Low blood sugar (hypoglycemia)
- changes in appetite
- vision issues
- disorientation and confusion
- weakness
- lethargy
- anxiety
- tremors
- loss of consciousness
Kidney failure
- vomiting
- diarrhea or constipation
- increased thirst and urination
- blood in urine
- lethargy
- depression
- loss of appetite
Anemia
- weakness
- lethargy
- depression
- panting
- exercise intolerance
- pale gums
- loss of appetite
What if your dog is the typical age (between 6 mths and 5 yrs) and breed to suspect idiopathic epilepsy? It still does not mean that they couldn’t have been poisoned or suffering from another acute life-threatening situation.
Seizures/convulsions in dogs are the one situation when I ignore my own rule of thumb
My rule of thumb for most issues is that a single occurrence does not a problem make. One bad stool, one vomit … though there are exceptions during which one vomit would send me to a veterinary hospital. When it comes to seizures, however, once occurrence is all it takes for me to seek medical help.
Related articles:
Really Angry Vet: Winston’s First Seizure
Further reading:
Seizures in Dogs