When to see a vet urgently
Unsteadiness that begins suddenly or worsens rapidly needs urgent assessment, particularly if:
- your cat cannot stay upright or falls repeatedly;
- there are seizures, a change in consciousness or severe confusion;
- symptoms began after an injury or your cat may have received a toxic substance or the wrong medicine.
Find a vet near you and contact the practice.
Overview
Ataxia develops when systems responsible for coordinating movement are damaged, including the cerebellum, balance organ or pathways in the spinal cord. Several types are distinguished according to the location:
- cerebellar ataxia: caused by damage to the cerebellum, with jerky movements, head tremors and a bouncing gait;
- vestibular ataxia: associated with dysfunction of the inner ear or balance nerves, causing a head tilt, circling and jerky eye movements (nystagmus);
- spinal, or sensory, ataxia: arising from damage to spinal cord pathways and causing an uncertain, unsteady gait.
A vestibular problem may be located in the inner ear or brainstem. Sensory ataxia pathways are not limited to the spinal cord either; a wider network of nerve pathways contributes to sensing body position. Locating the problem precisely affects which diseases are investigated and which area needs imaging.
Poor coordination and weakness can also occur together. Falling alone therefore does not show whether muscle strength is preserved. The vet separately assesses limb use, accuracy of steps and the ability to bear weight. With a cerebellar problem, steps may be exaggeratedly high or long without actual paralysis.
Causes
Ataxia may develop for several reasons:
- congenital abnormalities, such as cerebellar hypoplasia in kittens whose mother had a viral infection;
- head or spinal injuries;
- infections, including toxoplasmosis, viral infections and FIP;
- tumours or cysts of the brain and spinal cord;
- poisoning from medicines, toxins or heavy metals;
- nutritional deficiencies, such as a lack of thiamine (vitamin B1);
- vascular disorders, including strokes and haemorrhages.
The age at onset and progression provide clues but do not establish the cause alone. Cerebellar hypoplasia, or incomplete development, may only become apparent when a kitten begins standing. New unsteadiness in an adult that previously moved normally should not automatically be explained by the same developmental disorder.
Thiamine deficiency is one treatable possibility, assessed according to dietary history and other findings. A deficiency may be associated with an incorrectly formulated diet or certain processing and storage practices, for example. Besides unsteadiness, it can cause head tremors, downward bending of the neck and seizures. Not every unsteady cat has a vitamin deficiency, however.
Risk factors
- kittens whose mother had a viral infection, such as panleukopenia;
- elderly cats, with a greater risk of tumours and vascular disorders;
- cats that go outdoors, with a risk of injuries and accidental poisoning;
- cats with chronic infections.
Risks differ between the diseases causing ataxia, and there is no single risk profile shared by every affected cat. Information on risk factors for the syndrome as a whole is particularly limited. A kitten's developmental disorder, an adult's inner ear disease and sudden poisoning require different investigations. Background information helps guide tests but does not replace examination.
Symptoms
Typical signs of ataxia in cats include:
- an unsteady, unstable gait;
- loss of balance and falling;
- a wide stance when walking;
- tremors of the head or limbs;
- a head tilt to one side;
- uncontrolled eye movements (nystagmus);
- difficulty jumping or climbing.
With a cerebellar developmental disorder, a cat may look fairly normal at rest, but purposeful movement reveals a tremor. Reaching for a toy or food bowl, for example, may intensify head tremors. This movement-related tremor differs from constant general shaking or a seizure involving loss of consciousness.
With a vestibular disorder, your cat may tilt their head, fall to the same side and have involuntary back-and-forth eye movements. Symptoms can begin dramatically even with a disease that later recovers well. Similar signs may arise from a more serious cause, however, so a head tilt alone does not determine the prognosis.
Possible complications
Ataxia itself is not life-threatening, but it is a symptom of serious diseases. Without treatment of the underlying cause, the condition may progress, causing falls and injuries, loss of mobility and reduced quality of life. The prognosis may be poor if a tumour, severe infection or poisoning is responsible.
Sudden ataxia may signal a life-threatening underlying disease and should not be considered safe to monitor at home on the basis of the general description above. Conversely, not all ataxia progresses: confirmed cerebellar hypoplasia differs from progressive brain degeneration or a tumour. A developmental disorder can cause permanent clumsiness without pain and allow a good life in a suitably adapted home.
Diagnosis at the vet
To investigate the cause of ataxia, the vet performs:
- a neurological examination;
- blood and urine tests to identify infections and metabolic disorders;
- tests for viral infections, including FeLV, FIV and coronavirus;
- imaging, including X-rays, ultrasound and MRI or CT if needed;
- cerebrospinal fluid analysis if inflammation is suspected.
The history helps locate the problem
Explain when your cat last moved normally, whether symptoms started suddenly or gradually and whether they have worsened. Also mention medicines given, dietary changes, possible injuries and other illnesses. Weakness, dizziness and an episode may mean different things to different owners, so a concrete description of the movements is useful.
As well as movement, the neurological examination assesses consciousness, postural responses and cranial nerve function. A head tilt is distinguished from turning the head to one side. Eye movements and pupil responses may provide further information about the site of damage. The examination is adapted to your cat's condition; a severely injured cat does not undergo the same movement tests as a stable patient.
The ears are examined if the findings fit vestibular disease. Imaging may look for changes deeper in the ear or skull if needed. The purpose of blood tests and other imaging varies according to whether a metabolic disorder, inflammation or structural injury is suspected, for example. Not every cat automatically needs every investigation listed.
What does a positive viral test mean?
A coronavirus antibody result shows previous exposure but does not confirm FIP on its own. Ordinary feline enteric coronavirus is common and does not mean that FIP is causing your cat's unsteadiness. PCR results also have limitations depending on the sample type and situation. Interpretation combines symptoms, other findings and laboratory results.
Treatment and support for daily life
There is no single medicine for every case of ataxia. Treatment may target an identified infection, pain, nausea or nutritional deficiency, for example. Potentially toxic medication and other exposures are assessed separately. If thiamine deficiency is responsible, the vet plans vitamin treatment and corrects the diet; a supplement given on your own initiative does not replace investigating the cause.
With a severe balance disturbance, your cat may be unable to eat or drink even when muscle strength remains. Assisted feeding, fluid therapy and relief of nausea may then be needed. In idiopathic vestibular syndrome, no precise cause is identified. Care may rely on support and ensuring safety once other causes have been assessed.
At home, restrict access to stairs and places from which your cat could fall. Arrange food, water and the litter tray so they can be reached safely. In cerebellar hypoplasia, raising the bowl to a suitable height may make eating easier. Adapt the environment to the individual abilities of a cat with severe coordination difficulties.
Cerebellar hypoplasia cannot be corrected by using a medicine to grow the missing tissue. However, a cat may learn to manage their movement limitations. This developmental disorder itself is not contagious to other cats. An affected cat is kept in a safe indoor environment because loss of balance increases the risk of injury outdoors.
Follow-up assesses both the underlying disease and practical ability to function. Consider whether your cat can move, eat, drink and use the litter tray, and whether there is pain or nausea. Wellbeing is not judged solely by whether walking looks normal. A new change in consciousness, seizures or rapidly worsening movement needs another urgent assessment.
Prevention
Because ataxia is a symptom, prevention targets underlying diseases:
- vaccination against viral diseases;
- a balanced diet and adequate vitamin intake;
- keeping toxic substances out of the environment;
- reducing injury risks, particularly for kittens and elderly cats;
- regular veterinary check-ups.
Prevention does not eliminate every possible neurological disease. Balanced feeding should not be replaced with large vitamin supplements given as a precaution: excessive vitamin A, for example, can cause skeletal changes and neurological signs. Also tell your vet about a high intake of liver and any supplements.
This text provides general information and does not replace veterinary care. If your cat develops symptoms, contact a vet.
Frequently asked questions
Is an unsteady cat always weak?
No. In ataxia, movement coordination may be disrupted even when muscle strength remains. Weakness and ataxia can also occur together, so the distinction is made through examination rather than falling alone.
Can a cat with cerebellar hypoplasia have a good life?
Yes. The condition itself is not painful, and many cats learn to adapt to permanent clumsiness. A safe indoor home and eating and movement areas arranged according to their abilities are needed. New symptoms should still not automatically be attributed to the old diagnosis.
Does a positive coronavirus test mean FIP is causing the ataxia?
No. An antibody result in particular indicates exposure and does not prove FIP alone. The cause of neurological signs is investigated as a whole, and assessment of possible FIP requires other findings too.
This article is for general information only and is not a guide to treatment. If you notice the first signs of illness, contact your vet.
Paw4care editorial team
Sources
- Ataxia in Cats, VCA Animal Hospitals, accessed 2026-11-02.
- Cerebellar Hypoplasia in Cats, VCA Animal Hospitals, accessed 2026-11-02.
- The Neurologic Examination of Animals, Merck Veterinary Manual, accessed 2026-11-02.
- Feline Infectious Peritonitis, Cornell University College of Veterinary Medicine, accessed 2026-11-02.
- Vestibular Syndrome, Cornell University College of Veterinary Medicine, accessed 2026-11-02.
- Nutritional Disorders of the Spinal Column and Cord in Animals, Merck Veterinary Manual, accessed 2026-11-02.