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Writer's pictureLiz Adams

Dilated Cardiomyopathy (DCM): A heart condition in dogs

Updated: Sep 24

Understanding common health conditions is key to providing the best care for your new furry friend. One such condition that can affect dogs is Dilated Cardiomyopathy (DCM). This serious heart disease can be challenging, but with the right knowledge, you can help a dog with DCM live a fulfilling life.


What is Dilated Cardiomyopathy (DCM)?


Dilated Cardiomyopathy is a disease of the heart muscle that primarily affects large and giant dog breeds, though it can occur in smaller breeds too. In DCM, the heart's ability to pump blood is decreased because the heart's main pumping chamber — the left ventricle — is enlarged and weakened. This weakening can lead to heart failure and other serious complications.


The exact cause of DCM isn’t always clear, but it can be linked to genetics, diet, or even certain infections. Some breeds are more predisposed to developing DCM, including Doberman Pinschers, Boxers, Great Danes, and Cocker Spaniels. But any dog can be at risk, making awareness and early detection crucial.


Recognizing the Symptoms of DCM


One of the challenges of DCM is that its symptoms can be subtle, especially in the early stages. Here are some signs to watch for:

  • Coughing: A persistent cough can indicate fluid buildup in the lungs due to poor heart function.

  • Lethargy: Dogs with DCM may become unusually tired or unwilling to engage in activities they once enjoyed.

  • Shortness of Breath: Difficulty breathing or rapid breathing can signal that the heart isn’t pumping efficiently.

  • Weight Loss: Unexplained weight loss can occur as the disease progresses.

  • Fainting: In severe cases, dogs may collapse or faint due to a lack of blood flow to the brain.

a yellow lab at the vet with an xray

If you notice any of these symptoms in a dog, it’s important to consult a veterinarian as soon as possible. Early detection and intervention can make a significant difference in managing the disease.


Diagnosing and Treating DCM


Diagnosis typically involves a combination of a physical exam, chest X-rays, an electrocardiogram (ECG), and an echocardiogram, an ultrasound of the heart. These tests help the vet determine the severity of the condition and the best course of treatment.


While there’s no cure for DCM, treatment options can help manage the symptoms and improve the quality of life for affected dogs. Treatment often includes:

  • Medications: Drugs to help the heart pump more effectively, reduce fluid buildup, and regulate heart rhythm.

  • Dietary Changes: In some cases, a diet low in sodium and supplemented with specific nutrients may be recommended.

  • Regular Monitoring: Frequent vet visits to monitor the dog's heart function and adjust treatment as needed.

a dog at the vet with an IV

Adopting a Dog with DCM or Other Heart Conditions


For potential adopters, the idea of adopting a dog with a heart condition might seem daunting. But dogs with DCM can still lead happy, loving lives with the right care and attention. These dogs often require a bit more monitoring and a commitment to regular vet visits, but they have just as much love to give as any other dog.


By adopting a dog with DCM, you’re offering them a second chance at life and providing a home where they can thrive despite their condition. Rescues play a crucial role in finding these dogs the right homes, educating adopters about their condition, and supporting them throughout the adoption process.


How Rescues Can Support Dogs with DCM


Animal rescues can make a big difference in the lives of dogs with DCM by:

Educating Potential Adopters: Providing clear, accurate information about DCM and what to expect can help adopters feel more confident in their decision to adopt a dog with an existing health condition.

  • Partnering with Veterinarians: Ensuring that dogs receive a proper diagnosis and treatment plan before adoption can set them up for success in their new homes.

  • Offering Ongoing Support: Rescues can stay connected with adopters, offering guidance and resources as they care for a dog with DCM.


a German Shepard dog in a backyard
Our Snack Quality Tester Kayman has DCM

Our own Snack Quality Tester, Kayman, was born with DCM. The rescuer who first found Kayman knew something wasn't right because he got tired very quickly and didn't gain weight even though he wasn't even a year old at the time. Her vet suspected DCM and a vet cardiologist confirmed the finding once he was officially in rescue. He slows down a little quickly, but lives an otherwise normal life, wrestling with Dexter and Baby, playing outside everyday, and chasing Chang around the house. We're just careful he doesn't overdo any regular activities.


Dilated Cardiomyopathy is a serious condition, but it doesn’t have to be a barrier to adoption. With the right care, dogs with DCM can live joyful, loving lives. By understanding this disease, rescue leaders and potential adopters can make informed decisions that help these dogs find their forever homes. After all, every dog deserves a chance to live their best life, no matter their heart condition.

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