Hearing your dog cough can be worrying—especially when it seems to come out of nowhere. While some coughs are mild and temporary, others can be a sign of an underlying health issue that needs attention. Understanding the possible causes of coughing can help you know when to monitor at home and when it’s time to call your veterinarian.

A Note From Our Doctors

At Peak City Veterinary Hospital, we know how unsettling it can be to hear your dog coughing or gagging. Many pet parents worry that something serious is wrong—and sometimes, they’re right to trust that instinct.

Coughing can have many causes, ranging from minor irritation to more serious heart or lung conditions. Our goal is to help you understand what your dog may be experiencing and to partner with you in deciding the best next steps for their comfort and health.

With care,

The Doctors and Team at Peak City Veterinary Hospital

What Does a Dog Cough Sound Like?

Dogs can cough in different ways, and the sound can offer helpful clues:

  • Dry, hacking cough (often described as sounding like a goose honk)
  • Moist or productive cough
  • Gagging or retching after coughing
  • Coughing that worsens with excitement or exercise

If possible, taking a short video of your dog coughing can be very helpful for your veterinary team. 1

Common Causes of Coughing in Dogs

Kennel Cough (Canine Infectious Respiratory Disease)

Kennel cough is a contagious respiratory infection that commonly causes a dry, hacking cough. Dogs can be exposed anywhere other dogs gather, such as boarding facilities, grooming salons, dog parks, or training classes. Most dogs recover well, but some may need treatment.

Heart Disease

Coughing—especially at night or during rest—can be a sign of heart disease, particularly in small and senior dogs. As the heart enlarges or fluid builds up in the lungs, coughing may occur.

Allergies or Airway Irritation

Just like people, dogs can react to dust, pollen, smoke, or strong scents. These irritants may cause intermittent coughing, sneezing, or throat clearing.

Tracheal Collapse

Common in small-breed dogs, tracheal collapse can cause a distinctive honking cough, often triggered by excitement, pressure on the neck, or exercise.

Pneumonia or Lung Disease

More serious conditions like pneumonia or chronic lung disease may cause coughing along with lethargy, fever, difficulty breathing, or decreased appetite.

Heartworm Disease

Heartworms can also lead to coughing due to damage to the heart and lungs—another reason consistent prevention and annual testing are so important.

When Should I Be Concerned?

You should contact your veterinarian if your dog’s cough:

  • Lasts more than a few days
  • Is getting worse or more frequent
  • Is accompanied by lethargy, fever, or loss of appetite
  • Occurs at night or during rest
  • Is paired with difficulty breathing or collapse

If your dog is struggling to breathe or appears distressed, seek veterinary care immediately.

How Is Coughing Diagnosed?

At Peak City Veterinary Hospital, diagnosing the cause of a cough may include:

  • A thorough physical exam
  • Listening to the heart and lungs
  • Chest X-rays
  • Heartworm testing
  • Additional diagnostics as needed

This step-by-step approach allows us to tailor treatment specifically to your dog’s needs.

A yellow Labrador Retriever sitting in a green field with its mouth open, appearing to cough.

How Peak City Veterinary Hospital Can Help

We’re here to support you and your dog every step of the way. Our team offers:

  • Compassionate evaluations for coughing dogs
  • Diagnostic testing to identify the root cause
  • Individualized treatment plans
  • Preventive care to reduce future risk

We’ll always take the time to explain our findings and answer your questions.

Our Final Thoughts

A cough doesn’t always mean something serious—but it’s never something to ignore. Early evaluation can make a big difference in your dog’s comfort and long-term health.

Give us a call at Peak City Veterinary Hospital to schedule an appointment if your dog has a persistent or concerning cough. We’re honored to care for your pet and to help keep them feeling their best.