Why has my pet suddenly started trembling or shaking?

Trembling can stem from pain, anxiety, hypoglycaemia, or a neurological problem. Record the episodes and consult your vet to determine whether further investigation is needed.

What can I observe at home to help the vet diagnose my pet?

Filming videos of tremors or walking, noting the timing and frequency of episodes, and tracking changes in appetite and elimination are all very helpful for your vet to determine the cause.

What tests does the vet usually order?

Common tests include a neurological examination, blood count and biochemistry, and radiographs; CT or MRI may be arranged if needed. Complete all tests as recommended by your vet.

What is the prognosis for tremors or incoordination?

Prognosis varies by cause; transient metabolic disorders often improve, while structural or neurodegenerative conditions depend on the test findings and response to treatment. Follow your vet's guidance for monitoring.

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

Hypermetria & Ataxia in Dogs and Cats: Tremors, Gait Problems, Neuroimaging & Care Guide [2025]

Hypermetria and ataxia are signs of cerebellar disease in which an animal's movements are exaggerated or poorly coordinated. Causes include congenital, inflammatory, or neoplastic lesions, and MRI is required to confirm the underlying cause.

Take 1 minute to check the symptoms first

Last updated: 2026/01/05

Pethealthmap Editorial Team

Sources: ACVIM, National Taiwan University Veterinary Teaching Hospital

When to See a Vet

Seek Emergency Care Immediately

•Sudden and complete inability to stand or walk on their own
•Continuous severe trembling or whole-body shaking that does not stop
•Prolonged loss of consciousness or unresponsiveness

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

•Recurring brief trembling episodes that resolve on their own
•Slowed gait or unsteadiness when moving
•Noticeably reduced activity level or decreased appetite

01What symptoms indicate a problem?

Hypermetria and ataxia typically present as abnormal movement coordination and involuntary movements, often accompanied by changes in alertness or activity level.

Whole-body or limb tremors of varying frequency and duration
Deteriorating gait, stumbling, or drifting when walking, with impaired balance
Reduced activity level, easy fatigue, or reluctance to move voluntarily
Uncontrolled head or body bobbing and jerking movements
Behavioural changes, decreased interaction, or altered mentation
If symptoms persist or worsen, schedule a neurology specialist appointment as soon as possible

02How to assess the situation at home: what to observe and when to seek emergency care

Recording key information at home before the vet visit helps your veterinarian assess the condition quickly and arrange appropriate tests.

Note the onset time, frequency, and duration of tremors or abnormal movements
Observe and record changes in alertness and willingness to interact with you
Track appetite, water intake, and any vomiting or swallowing difficulties
Monitor frequency, colour, and any difficulty with urination or defecation
Measure and record weight changes, weighing your pet if needed
Film video clips on your phone showing your pet both at rest and moving
Bring all records and videos to the specialist clinic to assist with assessment

03How will the vet diagnose this? Common diagnostic tests

Your vet will combine a physical and neurological examination with laboratory and imaging tests to identify the cause and localise the lesion.

Neurological examination

assessing consciousness, reflexes, and coordination to localise the lesion

Complete blood count and biochemistry

screening for infection, electrolyte imbalances, or metabolic disorders

Radiography

evaluating skeletal and thoracic or cervical structural abnormalities

CT scan

rapid assessment of intracranial or cervical spinal lesions and trauma

MRI

high-resolution imaging of the brain and spinal cord — the preferred test for neurological disease

Biopsy or PCR

to characterise infectious or neoplastic lesions when indicated

For advanced imaging, book a specialist hospital with MRI capability

04How is it treated and managed after diagnosis? Medications, diet adjustments, and care guide

Treatment depends on the underlying cause; ongoing monitoring and follow-up imaging should be arranged as directed by your vet.

Mild cases may be managed with rest, observation, and supportive care
Moderate to severe cases or those requiring vital sign stabilisation may need hospitalisation and supportive therapy
Medications and treatment plans are adjusted based on test results, with monitoring of clinical response
Dietary adjustments or nutritional support may be used as adjunct therapy
Keep a symptom diary and video recordings during home care to share at follow-up visits
Schedule regular check-ups and follow-up imaging as directed by your vet

05What to prepare before the vet visit: key information to help your vet diagnose quickly

Note the onset time, progression of symptoms, and any relevant events

List all current and previous medications, supplements, and vaccination records

Bring filmed videos of tremors or gait abnormalities (both at rest and moving)

Prepare a daily log or notes on appetite, water intake, and elimination habits

Bring any prior test reports (bloodwork, radiographs, MRI) if available

Book a specialist hospital with neuroimaging (MRI/CT) capability in advance

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.