Heartworms are parasitic worms that can have serious consequences for a dog's health. They are transmitted through mosquito bites and can grow up to a foot long, living in the heart, lungs, and blood vessels of infected dogs. Here are some key ways heartworms can affect a dog's health:

1. **Heart Damage**: As heartworms grow, they can cause damage to the heart and arteries. This can lead to heart failure as the heart struggles to pump blood effectively.

2. **Lung Damage**: Heartworms can also migrate to the lungs, causing inflammation and damage to lung tissue. This can result in respiratory issues, such as coughing and difficulty breathing.

3. **Exercise Intolerance**: Dogs infected with heartworms may show a lack of energy and an unwillingness to engage in physical activities. This is often due to the strain on their heart and lungs.

4. **Weight Loss**: As the disease progresses, dogs may lose weight and have a decreased appetite due to the body's inability to function properly.

5. **Potential for Sudden Death**: In severe cases, the presence of many heartworms can lead to sudden death, especially if a large number of worms block blood flow.

6. **Symptoms to Watch For**: Common symptoms of heartworm disease include coughing, fatigue, decreased appetite, and weight loss. Regular veterinary check-ups and preventive medications are crucial for keeping dogs safe from heartworms.

Prevention is key! Heartworm disease is preventable with monthly medications prescribed by your veterinarian. Regular testing for heartworms is also recommended, especially in areas where heartworm is prevalent.

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Topics covered in this question:

Dog Health Veterinary Care Prevention Heartworms Symptoms