My Dog Keeps Coughing—What Should I Do Now?

Why Is My Dog Coughing? Common Causes

Coughing in dogs is a reflex caused by irritation in the airway. Common causes include respiratory infections like kennel cough, heart disease, chronic bronchitis, collapsing trachea, inhaled irritants (such as grass seeds or fumes), and foreign objects in the lungs. Heartworms, which are spread by mosquitoes, can also cause coughing, especially during exercise. A persistent cough may also be linked to tumors, allergies, or bacterial infections.

The type of cough can offer clues: a dry, hacking cough worsened by excitement or exercise often points to kennel cough. A moist, bubbling cough may indicate pneumonia. A high-pitched, "goose-honk" cough is typical of collapsing trachea, especially in small breeds. Coughing at night or while lying on the chest may suggest heart disease.

When to See a Vet Right Away

If your dog’s cough lasts more than a week, or if it is sudden, severe, or accompanied by other symptoms like fever, loss of appetite, wheezing, rapid breathing, or exercise intolerance, contact a veterinarian immediately. These signs may indicate a serious condition such as bacterial pneumonia, heartworm disease, or a foreign body in the airway. Dogs with weakened immune systems—like puppies or toy breeds—are at higher risk for complications from kennel cough.

Unexplained coughing should always be investigated by a vet. Avoid giving cough medicines without professional guidance, as they can delay proper diagnosis and treatment. A vet may recommend chest X-rays, blood tests, or a transtracheal wash to identify the cause.

Immediate Care Steps at Home

While waiting for veterinary care, keep your dog in a calm, stress-free environment. Avoid strenuous exercise, especially off-leash running or pulling on a collar. Use a harness or head halter instead to reduce pressure on the trachea. Keep the air moist—using a cool-mist vaporizer or having your dog in the bathroom during a hot shower can help ease airway irritation.

For kennel cough, a warm, dry, and well-ventilated space is ideal. Humidification may help loosen secretions and ease breathing. Moderate daily movement can assist in bronchial drainage, but avoid overexertion.

Treatment Options Based on Diagnosis

Treatment depends on the underlying cause. Kennel cough is typically treated with antibiotics (like tetracyclines or trimethoprim-sulfa) for 7–10 days and may include cough suppressants if needed. Severe cases with pneumonia require hospitalization and intravenous antibiotics.

If a foreign body is suspected—such as a grass seed or food particle—bronchoscopy is often used to locate and remove it, especially if done within two weeks of inhalation. Collapsing trachea is managed with weight control, avoiding irritants like smoke, and using a harness instead of a collar. In severe cases, medical or surgical intervention may be needed.

Heartworms require specific treatment, and prevention is key—discuss preventative options with your vet.

Prevention and Long-Term Care

Prevent kennel cough with the intranasal or intramuscular Bordetella vaccine, especially for dogs in boarding, grooming, or show environments. Routine vaccines like CPI and CAV-2 also help reduce severity. Keep your dog away from crowded, poorly ventilated areas during outbreaks.

For dogs with chronic coughs, maintain a healthy weight, avoid smoke and pollutants, and use a harness to reduce tracheal strain. Regular vet check-ups can catch issues early, especially in older or small breeds prone to collapsing trachea.