Pattern Baldness in Dogs

Category: Skin & Connective Tissue
Breeds documented: 1
Published sources: 2

Overview

This form of hair loss develops in a recognizable pattern, often while a dog is still young. Affected areas vary: some dogs lose hair from their ears, others from the underside of the body or backs of the thighs. The hair follicles become smaller and produce finer hairs. Both males and females can be affected, whether neutered or intact.

Signs to watch for

Gradually thinning hair on the outer ears
Bald patches along the underside of the neck and body
Hair loss on the backs of the thighs
Very fine, short hairs remaining in bald areas

Hair loss usually begins before the first birthday, often around 6 months.

When to get help Book a vet visit when new bald patches appear.

Diagnosis and tests

The vet considers the dog's age, coat changes, and pattern of hair loss, while checking for other skin problems. A small skin sample examined under a microscope can show unusually small, thin hair follicles. Skin scrapings and other tests may be needed to rule out infection, parasites, or hormone disorders.

Breeds with documented risk

1 breed

By breed size

1 Medium

American Water SpanielMedium · Sporting Group

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.