What is Dr. Zubair Khalid's research focus?

Dr. Zubair Khalid specializes in molecular virology, mRNA vaccine development, and computational biology, with a focus on avian pathogens like IBDV and Avian Reovirus.

Where is Dr. Zubair Khalid currently working?

Dr. Zubair Khalid is a Postdoctoral Research Associate at the University of Maryland (UMD), specifically within the Department of Animal and Avian Sciences.

Dog Kennel Cough Symptoms Come And Go

If your dog has a cough that seems to disappear for a few hours only to return with gusto, you are not alone. Many pet owners notice that kennel cough symptoms come and go, making it difficult to know whether the illness is improving or hiding. This pattern is actually a hallmark of canine infectious tracheobronchitis, commonly known as kennel cough. Understanding why symptoms fluctuate can help you provide better care and know when professional attention is needed.

Quick Q&A: Common Questions

Question: Why does my dog's kennel cough seem better at rest and worse after activity?

Answer: Kennel cough involves inflammation of the trachea and bronchi. When your dog rests, the airways are less irritated. After exercise, excitement, or pulling on a leash, the trachea stretches and triggers a forceful cough reflex. This intermittent pattern is normal and does not mean the infection is getting worse, as long as your dog is otherwise acting well.

Why Kennel Cough Symptoms Fluctuate

The classic kennel cough sound is a dry, hacking cough that often ends with a gag or retch, as if something is stuck in the throat. This cough is caused by inflammation of the upper airway lining. The severity of symptoms can vary throughout the day based on several factors.

Environmental Triggers

Changes in temperature, humidity, and air quality can make the cough worse or better. Cold air, dry indoor heating, or exposure to smoke and dust can irritate the already sensitive airways. Your dog may cough more during walks in chilly weather or after being in a dusty room. Conversely, warm, humid air from a bathroom shower can temporarily soothe the airway and reduce coughing.

Activity Level and Excitement

Exercise and excitement are common triggers. When your dog runs, barks, or pulls on the leash, the trachea moves and stretches, which can set off a coughing fit. This is why you may notice several dry coughs right after a walk or play session. Rest and calm activity tend to suppress the cough, giving the appearance that symptoms have resolved.

The Immune Response Cycle

Kennel cough is usually caused by a combination of viruses and bacteria, most commonly Bordetella bronchiseptica and parainfluenza virus. The body fights the infection in waves. As your dog's immune system gains the upper hand, symptoms may fade for hours or even a full day, only to reappear when the immune response flares again. This cycle can last 7 to 14 days in uncomplicated cases.

When the Intermittent Pattern Is Normal

For most healthy adult dogs, a cough that comes and goes over the course of a few weeks is typical and not a cause for alarm. You can expect the cough to be most noticeable:

First thing in the morning after sleeping
After drinking water
During or after exercise
When excited or barking
In cold or dry air

The cough may disappear entirely for several hours, only to return during one of these triggers. As long as your dog is eating, drinking, playing, and sleeping normally, this pattern is part of the expected recovery process.

When You Should Worry

While an intermittent cough is common, certain signs indicate that the infection may be worsening or that a secondary problem has developed. Contact your veterinarian if you notice any of the following:

The cough becomes more frequent or severe over several days instead of improving
Your dog develops a fever (lethargy, loss of appetite, shivering)
There is thick yellow or green nasal discharge
Your dog has difficulty breathing, breathes with an open mouth, or has blue-tinged gums
The cough becomes moist and productive instead of dry
Your dog stops eating or drinking

These signs may indicate pneumonia, which is a serious complication that requires prompt veterinary treatment.

Home Care for an Intermittent Cough

You can help your dog recover more comfortably with a few simple strategies.

Rest and Restrict Activity

Limit vigorous exercise and rough play while symptoms are present. Short, gentle walks on a harness (not a collar) are acceptable. A harness prevents pressure on the trachea, which can trigger coughing.

Use a Humidifier

Dry air worsens airway irritation. Placing a cool-mist humidifier in the room where your dog sleeps can help keep the airways moist and reduce coughing. You can also run a hot shower and let your dog sit in the steamy bathroom for 10 to 15 minutes a few times a day.

Avoid Irritants

Keep your home free of cigarette smoke, strong cleaning fumes, candles, and air fresheners. All of these can aggravate the cough and prolong recovery.

Offer Honey (With Caution)

A small amount of honey (half a teaspoon to one teaspoon depending on your dog's size) can soothe the throat and reduce coughing. Do not give honey to puppies under one year old or to diabetic dogs. Always check with your veterinarian first.

What to Expect at the Vet

If you bring your dog in because the cough keeps returning, your veterinarian will perform a physical exam, listen to the lungs and trachea, and may recommend chest X-rays or blood work if pneumonia is suspected. For uncomplicated kennel cough, treatment is usually supportive: rest, good nutrition, and sometimes a cough suppressant or anti-inflammatory medication.

Antibiotics are not always needed. They are reserved for cases where a bacterial component is confirmed or when symptoms are severe. Most dogs recover on their own within 1 to 3 weeks even without medication.

Prevention of Future Episodes

Vaccination against kennel cough is available and recommended for dogs who board, attend daycare, visit parks, or interact with other dogs. The vaccine does not prevent all cases, but it significantly reduces the severity and duration of symptoms. Booster schedules vary, so ask your veterinarian what is right for your dog.

Good hygiene also helps. Wash food and water bowls regularly, keep your dog's living area clean, and avoid contact with sick dogs during outbreaks.

The Bottom Line

When dog kennel cough symptoms come and go, it is often a sign that the infection is running its expected course. The intermittent nature of the cough reflects environmental triggers and the body's natural immune cycles. As long as your dog remains bright, eating well, and breathing normally, supportive home care is usually sufficient. Trust your instincts: if the pattern changes or your dog seems worse, a veterinary checkup is always the safest next step.