Disease Guide

Dog Seizures & Epilepsy Guide: Symptoms, Diagnosis & Long-Term Care [2025]

Canine epilepsy requires ongoing anti-seizure medication for long-term management

Last updated: 2026/01/06
PetHealthMap Editorial Team
Sources: IVETF, ACVIM, National Taiwan University Veterinary Hospital

When to See a Vet

Seek Emergency Care Immediately

  • Continuous seizure activity lasting more than a few minutes without stopping
  • Seizure lasting more than five minutes with failure to regain consciousness
  • Rapid breathing or blue/purple discoloration of gums or lips

Schedule a Clinic Visit Soon (within 24–72 hours)

  • Noticeable increase in seizure frequency within a short period
  • Prolonged lethargy or significant mental dullness after a seizure
  • Single seizure episode lasting close to or longer than one minute

01What signs indicate something is wrong?

Seizures commonly present as body convulsions, brief changes in consciousness, or unusual behaviour. After the episode your dog may breathe fast, run a raised temperature, or sleep for an extended period. Watch for the warning signs below that require urgent attention.

  • Generalised or partial convulsions with rigid limbs and involuntary movements
  • Brief loss of consciousness or reduced responsiveness, not reacting to their name
  • Vacant staring or momentary vision changes, with the eyes possibly flickering side to side
  • Rapid breathing and increased heart rate during a seizure, with possible rise in body temperature
  • Increased thirst or changes in appetite after a seizure episode
  • Reduced energy levels after a seizure, prolonged sleepiness or a slow recovery

Seek emergency care immediately if you notice the following symptoms:

  • ⚠️ The seizure does not stop on its own and keeps continuing
  • ⚠️ Consciousness has not returned after more than five minutes
  • ⚠️ Difficulty breathing, or gums and lips turning blue or pale

02How can you assess the situation at home? Key observations and emergency criteria

Keeping detailed records at home helps your vet identify the seizure pattern and probable cause. Here is what is most useful to track.

  • Record daily water intake and how often your dog drinks
  • Note any confusion, disorientation, or sluggish responses in their general behaviour
  • Track daily appetite and how much your dog actually eats
  • Monitor the frequency and colour of urination and bowel movements
  • Weigh your dog at the same time each day and log any trends
  • Use your phone to film any seizure and note the exact time it started and how many seconds it lasted

03How will the vet make a diagnosis? Common diagnostic tests

At the clinic your vet will use a systematic series of tests to rule out metabolic, infectious, or structural brain disease as potential causes. Common investigations include:

Blood tests and blood glucose monitoring to detect metabolic or electrolyte abnormalities

Urinalysis to assess kidney function and metabolic status

X-rays to evaluate the chest, abdomen, or skull for structural abnormalities

Abdominal ultrasound to check for underlying organ disease

Electrocardiogram (ECG) to assess heart rhythm and cardiac function

PCR or other infectious disease testing to rule out potential infectious causes

04What treatment and home care is needed? Medication, diet adjustments & care guide

Treatment covers both acute management during a seizure and long-term control of seizure frequency. The main focus is monitoring seizure control and watching for medication side effects.

  • Acute seizures may require short-term supportive oxygen therapy and stabilisation of vital signs
  • Starting or adjusting anti-seizure medication based on your vet's assessment, with regular blood monitoring
  • Keeping a log of seizure frequency, duration, and any observed medication side effects
  • Following your vet's nutritional guidance and ensuring adequate hydration
  • Attending regular follow-up appointments to evaluate treatment response and adjust medication as needed
  • Referral to a veterinary neurology specialist for advanced imaging or specialist monitoring when required

05What should you prepare before the vet visit? Key information to help your vet pinpoint the cause

1
Bring a video of the seizure with the time, frequency, and duration noted
2
Write down when each episode occurred, how long it lasted, and any warning signs beforehand
3
List all current medications, supplements, and the times they are given
4
Bring any recent blood test results or imaging reports for the vet to review
5
Note changes in drinking, appetite, and toileting after seizures so recovery can be assessed

This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.

Frequently Asked Questions (FAQ)