High severity

Wobbler (Cervical vertebral stenotic myelopathy)

Wobbler is cervical vertebral stenotic myelopathy (CVSM): compression of the cervical spinal cord from malformed or degenerative neck vertebrae. Owner-reported signs are often ataxia, stumbling, toe-dragging, or a horse that looks clumsy or lame but is neurologic — often worse behind. It is not EPM, not kissing spine, not ordinary lameness, and not Lyme or shivers. A photograph cannot diagnose wobbler / CVSM. A still cannot tell wobbler from EPM, other neurologic disease, kissing spine, or ordinary clumsiness. A still photo is especially weak here: this is a movement / neurologic problem. Diagnosis is a vet exam (often imaging), not a photo. The gait scan is a first look at the movement to share with a vet, not a wobbler test, and there is no wobbler scanner.

Symptoms to watch for

Ataxia, stumbling, or toe-dragging — often worse in the hind end — the movement is the clue, not a still photo

A horse that looks clumsy, weak, or lame but is neurologic — a reason to book a vet, not a photo verdict

May look normal in a still; the first sign is often a change in the way they move — that is a vet visit, not a photograph

A gait that can look like EPM, other neurologic disease, kissing spine, or ordinary clumsiness — a still cannot tell them apart

Proprioceptive mistakes, a wide or wobbly base, or a horse that trips when asked to walk and trot — a clue, not a diagnosis

A still photo is especially weak here: this is a movement / neurologic problem — a reason to book a vet, not a photo verdict

Common causes

Cervical vertebral stenotic myelopathy (CVSM / wobbler): compression of the cervical spinal cord from malformed or degenerative neck vertebrae — imaging and a vet exam are clues, not a photo diagnosis
Not EPM (protozoal myeloencephalitis), not kissing spine (dorsal spinous process impingement), and not ordinary lameness — a still cannot tell wobbler from those
Not Lyme disease and not shivers — those are different problems and need a vet
A still cannot tell wobbler from EPM, other neurologic disease, kissing spine, or ordinary clumsiness — those need a vet exam (often imaging)

Prevention

Watch for ataxia, stumbling, toe-dragging, or a horse that looks clumsy or lame but is neurologic, and book a vet rather than waiting on a photo
Do not work through a new incoordination, stumble, or wobbly hitch hoping it will settle — that is a vet visit, not a photo
Do not treat a photo, a still of a lame or wobbly stride, or a scan result as a diagnosis — a still is especially weak on a movement / neurologic problem
Do not treat a photo, a still of a clumsy stride, or a scan result as a diagnosis
A gait clip can help you and the vet look at the movement — it does not confirm or rule out wobbler / CVSM, and it cannot tell wobbler from EPM, other neurologic disease, kissing spine, or ordinary clumsiness

What to do

1
Book a vet visit if the horse is ataxic, stumbling, toe-dragging, or looks clumsy or lame but is neurologic. Diagnosis is a vet exam (often imaging) — not a photograph.
2
Do not treat a still of a lame or wobbly stride as a verdict. A still cannot tell wobbler from EPM, other neurologic disease, kissing spine, or ordinary clumsiness, and a still photo is especially weak here.
3
If you record a gait clip, film walk and trot on a hard, level surface from the side and from the front — that is a video, not a still, and it is a first look to share, not a diagnosis.
4
Use a gait scan only as a first look at the movement to share, not as a wobbler test. There is no wobbler scanner.
5
If wobbler / CVSM is confirmed, follow the plan your vet prescribes. Do not start a treatment protocol from a photo.
6
Keep the vet on the same page. Share what you see; do not treat a photo as a verdict.

When to call the vet

Pick up the phone if…

Schedule a vet visit if the horse is ataxic, stumbling, toe-dragging, or looks clumsy or lame but is neurologic, or if the horse looks normal at rest but the hitch appears when you ask them to walk and trot. Call sooner if the horse will not bear weight, is collapsing, or is in obvious distress. A photograph cannot diagnose wobbler / CVSM. A still cannot tell wobbler from EPM, other neurologic disease, kissing spine, or ordinary clumsiness — a still photo is especially weak here. Diagnosis is a vet exam (often imaging), not a photo. The gait scan is a first look at the movement, not a wobbler test, and there is no wobbler scanner.

Get a first look at the movement

Scan the gait in HorseCare. 5 free scans this month, then Pro.

Scan the gait

5 free scans this month, then Pro. Scans run in the HorseCare app.

Educational content only. Not a substitute for veterinary advice.