Moderate

Ewe neck

Ewe neck is an "upside-down" neck: a concave topline of the neck, a heavier underside, often with a high head carriage or poor muscling of the crest. It is a conformation / muscling issue, not a disease like sweeney (nerve atrophy of the shoulder). It is not sweeney, not kissing spine, not a hunter's bump, and not wobbler. A photograph cannot diagnose a ewe neck. A still cannot tell a ewe neck from poor muscling, a high head set, or a thin topline. Diagnosis is a vet exam. The conformation scan is a first look at the neck outline to share with a vet, not a ewe-neck test, and there is no ewe-neck scanner.

Symptoms to watch for

A concave, "upside-down" topline of the neck — the outline is a clue, not a still-photo verdict

A heavier underside of the neck, or a crest that looks poorly muscled

A high head carriage that sat with the change — the way they carry the head is a clue, not a diagnosis

Poor muscling, a high head set, or a thin topline that can look like a ewe neck — a still cannot tell them apart

A new or more obvious dip in the neck topline after work or a lay-off — a reason to book a vet, not a photo verdict

Some horses show only a weaker crest; the first sign is a dipped neck outline — that is a vet visit, not a photograph

Common causes

An "upside-down" neck: concave topline, heavier underside, often with a high head carriage or poor muscling of the crest
A conformation / muscling issue, not a disease like sweeney (nerve atrophy of the shoulder) — the outline is a clue, not a diagnosis
Not sweeney (shoulder atrophy), not kissing spine (back/spinous processes), not a hunter's bump (croup / tuber sacrale), and not wobbler (cervical vertebral stenotic myelopathy)
A still cannot tell a ewe neck from poor muscling, a high head set, or a thin topline — those need a vet

Prevention

Watch the neck outline from the side for a new dip in the topline, a heavier underside, or a weaker crest, and book a vet rather than waiting on a photo
Do not work through a newly dipped neck or a sudden high head carriage hoping the crest will fill in — that is a vet visit, not a photo
Note whether the head set is high, whether the crest looks poorly muscled, and whether the change is new, so you can tell the vet
Do not treat a photo, a dipped neck, or a scan result as a diagnosis
Conformation photos can help you and the vet look at the neck outline — they do not confirm or rule out a ewe neck, and they cannot tell it from poor muscling, a high head set, or a thin topline

What to do

1
Book a vet visit if the neck topline looks concave or upside-down, if the underside looks heavier, or if the crest looks poorly muscled. Diagnosis is a vet exam — not a photograph.
2
Do not start a home muscling or training protocol from a photo guess. A still cannot tell a ewe neck from poor muscling, a high head set, or a thin topline.
3
Photograph the neck in good light, from the side, and keep the photos on the horse's record so you and the vet can see change over time — a first look to share, not a diagnosis.
4
Use a conformation scan only as a first look at the neck outline to share, not as a ewe-neck test. There is no ewe-neck scanner.
5
If a ewe neck 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 neck topline looks concave or upside-down, if the underside looks heavier, or if the crest looks poorly muscled. Call sooner if the horse is ataxic, stumbling, or weak behind — that can be wobbler (high), not a ewe neck, and is a vet call, not a photo diagnosis. A photograph cannot diagnose a ewe neck. A still cannot tell a ewe neck from poor muscling, a high head set, or a thin topline. Diagnosis is a vet exam. The conformation scan is a first look at the neck outline, not a ewe-neck test, and there is no ewe-neck scanner.

Get a first look at the neck outline

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Scan conformation

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Educational content only. Not a substitute for veterinary advice.