Color Dilution Alopecia (CDA) in Dogs: Causes & Treatments

What is CDA in dogs?

Color dilution alopecia (CDA) is a hereditary condition that causes itchy, flaky skin and patches of thinning hair in dogs with a 'dilute' coat color. Dilute coat colors include fur considered blue (diluted from black) or light fawn (also known as Isabella, diluted from liver or chocolate-covered coats). This condition is also referred to as Blue Dog Disease. 

Dogs with CDA often seem to have normal, healthy fur as puppies but start to develop signs of the condition at about six months of age. 

What causes CDA?

CDA is mainly caused by genetic factors. Dogs with dilute coat colours have a recessive gene that leads to the dilution of pigments in their skin, coat, and eyes. This genetic anomaly can change the structure and function of a dog's hair follicles, resulting in hair loss and skin problems. 

What dog breeds are prone to developing CDA?

While this disorder is most often diagnosed in blue Dobermans, it has also been seen in other breeds, including the:

Not all dogs with dilute coat colors will develop CDA, and the severity of the condition can vary in dogs that do have it. 

How is CDA diagnosed?

Your veterinarian or veterinary dermatologist will conduct a thorough examination of your dog's skin and coat, observing the pattern and severity of hair loss along with any signs of skin infection or irritation.

If you book an appointment or are referred to our veterinary dermatologist, your pup's health status and history will be reviewed and further diagnostic tests, such as a hair analysis or skin biopsy may be performed to confirm diagnosis and rule out other potential conditions. Our veterinary dermatologist will work with you and your primary vet to ensure your dog receives the most comprehensive care possible.

How is CDA in dogs treated?

Treatment for color dilution alopecia is focused on managing the condition and relieving your dog's symptoms. Treatment for CDA may include:

• Topical therapies such as medicated shampoos and conditioners to help soothe irritated skin and manage secondary bacterial infections.
• Oral medications, such as antibiotics or anti-inflammatory drugs, to manage skin issues and inflammation.
• Omega-3 fatty acid supplements to help improve skin and coat health and reduce the severity of your dog's CDA symptoms.
• Avoidance of environmental triggers. Dogs with CDA need to be protected from extreme temperatures and harsh conditions that may aggravate skin issues.

Note: The advice provided in this post is intended for informational purposes and does not constitute medical advice regarding pets. Please make an appointment with your vet for an accurate diagnosis of your pet's condition.

Do you suspect your dog may have color dilution alopecia? Contact our Vancouver vets and book an examination today.