Heartworm disease is a serious and potentially fatal condition caused by parasitic worms that live in the heart and pulmonary arteries of infected dogs. Early detection is crucial for effective treatment. Here are some common symptoms to watch for:

1. **Coughing**: A persistent cough is often one of the first signs of heartworm disease. It may worsen with exercise.

2. **Fatigue**: Infected dogs may become easily tired and reluctant to engage in physical activities they once enjoyed.

3. **Weight Loss**: Unexplained weight loss can occur as the disease progresses, often due to a decrease in appetite.

4. **Difficulty Breathing**: As the disease worsens, dogs may show signs of labored breathing or shortness of breath.

5. **Swollen Abdomen**: In advanced cases, fluid may accumulate in the abdomen, leading to noticeable swelling.

6. **Pale Gums**: The gums may appear pale or bluish due to reduced oxygen levels in the blood.

7. **Fainting or Collapse**: In severe cases, dogs may faint or collapse due to heart failure.

If you notice any of these symptoms in your dog, it's important to consult a veterinarian as soon as possible. Early intervention can lead to better outcomes. Regular heartworm testing and preventive medication are essential to protect your dog from this disease.

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Topics covered in this question:

Dog Health Veterinary Care Symptoms Preventive Medicine Heartworm