Does my pet having a seizure always mean brain injury?

Seizures can have many causes, including toxin exposure, metabolic abnormalities, or brain disorders. Film the episode and seek veterinary care promptly so the vet can determine the cause through blood tests, imaging, and a thorough history.

What imaging tests will be performed at the clinic?

X-rays are commonly taken first to assess skull trauma or other concurrent injuries. CT or MRI may follow to evaluate intracranial haemorrhage, swelling, or structural damage, depending on the situation.

How can I record symptoms at home to help the vet?

Record when symptoms first appeared, how often they occur, and how long each episode lasts. Film any episodes and log changes in appetite and toilet habits — this information helps the vet quickly assess the situation.

What should I watch for during follow-up care for brain injury?

Follow the vet's schedule for imaging or blood test follow-ups, record whether symptoms are improving or worsening, adhere to medication and nursing instructions, and notify the vet immediately if anything changes.

How much do the tests and treatment usually cost?

Costs vary by clinic and region — ask your vet for an estimate before proceeding.

Disease Guide

Brain Injury in Dogs & Cats: Symptoms, Imaging & Home Care [2025]

Brain injury is a medical emergency that can result from road accidents or trauma, requiring urgent stabilisation and intracranial pressure management.

Take 1 minute to check the symptoms first

Last updated: 2026/01/05

Pethealthmap Editorial Team

Sources: AVMA, ACVIM, National Taiwan University College of Veterinary Medicine

When to See a Vet

Seek immediate emergency care

•Sudden loss of consciousness and unable to be roused
•Rapid breathing or obvious respiratory distress with pauses
•Persistent heavy bleeding that cannot be stopped and is rapidly worsening

Schedule a clinic visit soon (within 24–72 hours)

•Intermittent seizures or worsening involuntary muscle twitching
•Declining mental status, commonly presenting as weakness or lethargy
•Noticeably reduced appetite or prolonged refusal to eat

01What symptoms indicate something is wrong?

Brain injury can manifest in a variety of external and systemic signs, potentially affecting consciousness, movement, and vital signs — close monitoring is essential.

Heart rate slowing or rhythm changes (notably very slow or irregular)
Seizures or involuntary muscle twitching
Jaundice or obvious discolouration of the eyes or skin
Swelling or oedema of the limbs or entire body
Cyanosis of the lips or gums (mucous membranes appear blue-grey)
Unexplained bleeding or blood in the stool

Seek emergency care immediately if you notice the following symptoms:

⚠️ Sudden collapse, sustained unresponsiveness, or loss of consciousness
⚠️ Continuous heavy bleeding that cannot be stopped
⚠️ Rapid breathing or obvious respiratory distress

02How to assess the situation at home? Key monitoring points and when to go to emergency

Monitoring and recording key changes at home helps your vet quickly understand the condition and prioritise further investigation.

Record mental status and responsiveness (lethargy, hyperexcitability, or unresponsiveness)
Note any obvious changes in appetite and food intake
Record urination and bowel movements, and check for abnormal stool or urine
Weigh your pet regularly or track weight changes for comparison
Note whether water intake has increased or decreased
Film any episodes (record onset time, frequency, and duration)
Bring all records to the specialist or clinic for the vet's assessment

03How will the vet make a diagnosis? Common examination procedures

Upon arrival, the vet will conduct a systematic physical and neurological examination along with necessary imaging to determine the extent of brain injury and any concurrent complications.

Physical and neurological examination

assess consciousness, reflexes, and bilateral symmetry

X-ray

evaluate skull fractures or concurrent thoracic/abdominal conditions

Abdominal ultrasound

rule out internal haemorrhage or other organ abnormalities

Electrocardiogram (ECG)

check for arrhythmia or cardiac complications

CT or MRI

assess intracranial haemorrhage, swelling, or structural damage

Blood and coagulation tests

evaluate bleeding, infection, or metabolic abnormalities

Referral to a neurology specialist with CT/MRI capability if required

04How is brain injury treated and managed after diagnosis? Medications, dietary adjustments, and care guide

Treatment is tailored to the nature and severity of the injury; follow-up imaging and symptom monitoring are required after discharge.

The vet will assess whether anti-inflammatory or other supportive medications are needed
Oxygen therapy or other supportive treatments may be given to address hypoxia
Attend scheduled follow-up appointments to evaluate clinical and imaging progress
Maintain an appropriate diet and adequate hydration at home to support recovery
Continue recording symptom changes and bring records to each follow-up visit
Referral to a neurology specialist hospital for long-term monitoring as needed

05What to prepare before seeing the vet? Key information to help your vet identify the cause quickly

Note when symptoms first appeared and how they have changed over time

Prepare a recent log of your pet's diet and toilet habits

List all medications, supplements, names, and doses currently being used

Save videos and photos of symptom episodes to show at the appointment

Bring previous examination reports or imaging discs if available

Call ahead to ask whether a specialist or emergency appointment is recommended

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.