Color Dilution Alopecia in Dogs – CDA Causes & Treatments

The genetic skin condition color dilution alopecia (CDA) affects dogs bred to have coats that appear light fawn or blue. CDA can cause your dog's skin to become itchy and uncomfortable and lead to patch hair loss. Today, our Irvine vets explain the causes of CDA, which dog breeds are affected, and how it can be treated. 

What is CDA in dogs?

Also referred to as Blue Dog Disease, Color dilution alopecia (CDA) is a hereditary condition that causes itchy, flaky skin and leads to patches of thinning hair in dogs with a 'dilute' coat color. To be considered a dilute color, a dog's fur must appear blue (diluted from black) or light fawn (a color also known as Isabella, diluted from chocolate or liver-colored coats). 

Dogs with CDA often appear to have normal, healthy fur as puppies but start to develop signs of the condition at around six months old. 

What causes CDA?

Genetic factors are the primary cause of CDA. dogs with dilute coat colors have a recessive gene that causes the dilution of pigments in the their coat, skin, and eyes. This genetic alteration can affect the structure and function of a dog's hair follicles, leading to skin problems and hair loss. 

What breeds are prone to developing CDA?

While blue Dobermans are most often diagnosed with this disorder, it has been recognized in other breeds, including:

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

How is CDA diagnosed?

Your veterinarian will thoroughly examine of your dog's skin and coat, noting the pattern and severity of hair loss as well as any signs of skin irritation or infection. In some cases, your vet may recommend that a hair analysis or skin biopsy be done to confirm the diagnosis and rule out other possible conditions.

How is CDA in dogs treated?

For a dog diagnosed with color dilution alopecia, treatment will be 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.
• Regularly scheduled checkups to monitor the progression of your dog's CDA to alter your pet's treatment plan whenever necessary.

Can CDA be prevented?

The genetic nature of the disease means that CDA cannot entirely be prevented. If you are considering adopting a dog with a dilute coat be sure to do your research ahead of time, and speak to your breeder. Find out if your puppy's parents, grandparents, or older siblings have shown signs of CDA. 

Be sure to take your dog for regularly scheduled routine checkups so that your veterinarian can monitor the health of their skin and watch for early signs of CDA. Your vet may also recommend proactive steps to help protect your dog's skin health, such as a prescription diet that's high in Omega-3s or dietary supplements formulated to promote excellent skin health.

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 CDA? Our Irvine vets are here to help. Contact us today to book an examination for your pooch.