Short Ulna Syndrome in Dogs

Category: Bone & Joint
Breeds documented: 1
Published sources: 3

Overview

The two forearm bones, the radius and ulna, need to grow together for the front leg to stay aligned. If the ulna stops growing too early, it can hold back the still-growing radius and make the limb bow or twist. This uneven growth can leave the elbow or wrist poorly aligned. The resulting strain may cause pain, limping and later arthritis.

Signs to watch for

A front leg that looks bowed or crooked
A front paw turning inward or outward
Limping, stiffness or reluctance to run and jump
Uneven nail wear or scuffing of the paw
Difficulty putting weight on the leg in more severe cases

Changes develop while the dog is growing, often becoming noticeable between 5 and 12 months.

When to get help Arrange a vet visit soon if a growing dog's front leg starts to bow or twist.

Diagnosis and tests

A vet checks how the dog walks, how the front leg lines up and whether nearby joints are painful. X-rays show the bone shape and may identify growth plates that closed too early. CT scans can help measure more complex twisting or angulation before surgery.

Breeds with documented risk

1 breed

By breed size

1 Medium

DreverMedium · Foundation Stock Service

Inheritance

Not yet known
None of the sources we use states how this is inherited in dogs yet.

We've gathered what published sources say about this condition, so you can talk it through with your vet. It isn't veterinary advice: you and your vet know your dog best.