TL;DR: If your cat is falling to the side, it is a high-priority emergency indicating a serious balance or neurological issue that requires immediate veterinary attention.
Why is my cat falling to the side while walking?
When a cat falls to the side while walking, it is often a sign of ataxia or vestibular syndrome. This occurs when there is a disruption in the body's system for maintaining balance. It can be caused by issues within the inner ear, such as an infection, or problems within the central nervous system, such as a stroke, tumor, or inflammatory disease.
Is it an emergency if my cat suddenly loses its balance?
- Sudden loss of balance or coordination is a high-priority clinical sign that requires immediate veterinary attention.
- Watch for accompanying symptoms like nausea, rapid eye movements (nystagmus), or a head tilt.
- Because these symptoms can mimic life-threatening conditions like poisoning or cardiovascular events, you should contact an emergency veterinarian immediately.
How can a photo or video help the veterinarian triage my cat?
- Provide a short video of your cat attempting to walk to show the triage team their specific "drunken" gait.
- Use video to capture involuntary eye movements (nystagmus) that may not be visible in a still photo.
- Visual evidence helps the veterinarian determine if the issue is likely localized to the ear or if it is a more complex neurological emergency.
- Photos can be used to document a persistent head tilt or abnormal posture.
Clinical Context (Merck Veterinary Manual)
Vestibular dysfunction can cause ipsilateral falling, rolling, or circling in cats. Lesions in the midbrain, pons, and medulla oblongata may result in paresis or paralysis of the limbs, often more severe on the side of the lesion. Cerebellar lesions produce ataxia and dysmetria. If abnormalities are not found on head evaluation, the lesion is likely in the spinal cord, peripheral nerves, or muscles. Evaluation of gait, postural reactions, hemistanding, and hemiwalking can detect subtle deficits.
Chapter: Neurology
Source: The Merck Veterinary Manual, 11th Edition (Page 1217)