Yes, a runny nose (nasal discharge) is a common secondary symptom of kennel cough, as the infection affects the upper respiratory tract.
Your dog starts coughing — that dry, hacking sound that makes you suspect kennel cough right away. But then you notice a little moisture at the nostrils, maybe a sneeze or two, and suddenly you’re questioning whether this is something else entirely. A runny nose in a dog with a cough feels like an unexpected twist.
The honest answer is that a runny nose fits perfectly within the kennel cough picture for many dogs. While the honking cough gets all the attention, nasal discharge is one of several possible signs that help complete the clinical story — and understanding which symptoms cluster together can make you a better observer when your dog gets sick.
Typical Symptoms of Kennel Cough
Kennel cough, formally called Canine Infectious Respiratory Disease Complex (CIRDC), is a highly contagious condition that irritates the lining of the upper airways. The most recognizable sign is a forceful, dry cough that sounds like something is stuck in the throat.
But the infection doesn’t stop at the trachea. The viruses and bacteria involved — including Bordetella bronchiseptica — can affect the nose and sinuses, which explains why a runny nose and sneezing are listed as common symptoms by veterinary authorities. Eye discharge and mild lethargy sometimes tag along as well.
Most dogs with kennel cough bounce back within 7 to 10 days, per the AVMA, even without specific treatment. The illness is typically mild in healthy adults, though puppies and seniors face a higher risk of complications like pneumonia.
Why Some Dogs Have a Runny Nose and Others Don’t
If your dog has a classic hacking cough but no nasal discharge, that’s perfectly normal — and equally normal if your dog’s nose starts running. The variation depends on which pathogen is involved and how your dog’s immune system responds.
Several factors influence whether nasal symptoms appear:
- Specific pathogen: Bordetella infections often produce more nasal discharge and sneezing than viral forms of kennel cough.
- Individual immune response: Some dogs mount a stronger inflammatory reaction in the nasal passages, leading to more mucus production.
- Age and overall health: Puppies, seniors, and dogs with preexisting respiratory conditions tend to have more pronounced symptoms.
- Coinfections: When more than one pathogen is involved, the symptom profile widens and nasal discharge becomes more likely.
- Environmental triggers: Exposure to cold air, dust, or smoke can worsen nasal irritation and make discharge more noticeable.
Your dog may appear perfectly healthy apart from the cough, as noted by some veterinary resources, or may show a full suite of cold-like signs. Neither scenario is unusual.
How a Runny Nose Fits Into Kennel Cough
The same inflammation that triggers the cough can travel upward into the nasal passages. Mucus builds up in the sinuses, and the body responds by producing more discharge to flush out the irritants. This is why some dogs with kennel cough develop a reverse sneeze — a sniffling, honking sound that happens through the nose rather than the throat.
A reverse sneeze often signals post-nasal drip: mucus from the sinuses trickles down to the back of the throat, creating a tickle that the dog tries to clear by rapidly inhaling. The VCA Hospitals explain that any irritation to the nose, sinuses, or throat can trigger this reflex, making it a common companion to kennel cough.
The AVMA lists a runny nose as common sign of kennel cough alongside sneezing and eye discharge in its canine infectious respiratory disease complex overview. So when you see both a cough and a trickling nose, you’re looking at a predictable duo.
| Symptom | Description | Frequency in Kennel Cough |
|---|---|---|
| Dry hacking cough | Forceful, honking cough that may be triggered by excitement or cold air | Almost always present |
| Runny nose | Clear or slightly cloudy nasal discharge | Common |
| Sneezing | Rapid expulsion of air through nose | Common |
| Eye discharge | Watery or thick eye gunk | Occasional |
| Lethargy | Mild decrease in energy and playfulness | Occasional |
| Fever | Temperature above 103°F (not always present) | Less common |
| Loss of appetite | Reduced interest in food | Less common |
Not every dog shows each symptom — your dog’s specific mix depends on the pathogen strain and their immune status.
When a Runny Nose Signals Something More Serious
Most kennel cough cases run their course without trouble, but certain red flags warrant a vet visit — especially when nasal discharge is involved.
- Discharge turns yellow or green: This suggests a secondary bacterial infection in the sinuses or airways that may require antibiotics.
- Fever persists longer than 48 hours: A high temperature combined with nasal discharge and cough could indicate pneumonia.
- Appetite and energy plummet: If your dog stops eating completely or seems profoundly lethargic, the respiratory infection may have moved deeper.
- Breathing becomes labored: Open-mouth breathing, flared nostrils, or belly heaving are emergencies, especially in puppies and senior dogs.
- Cough lasts beyond 14 days: A lingering cough with nasal discharge may point to a different issue like a foreign body or chronic bronchitis.
Healthy adult dogs typically handle kennel cough well, but the infection can be life-threatening in very young or elderly dogs. Trust your gut — if your dog seems sicker than a mild cold, get them checked.
Treating a Runny Nose With Kennel Cough
There’s no specific cure for kennel cough itself; most dogs recover with rest and supportive care. A runny nose often clears up on its own as the immune system gains the upper hand, but gentle cleaning of the nostrils with a damp cloth can keep your dog comfortable.
Steam therapy — sitting with your dog in a steamy bathroom for 10 minutes — may help loosen nasal mucus and soothe irritated airways. Keeping your dog away from smoke, dust, and cold drafts also reduces nasal irritation while they heal.
A guide from Allkindsvet lists a secondary symptom runny nose as one to watch, noting that it often resolves without intervention. If the discharge gets thick, colored, or persists beyond the recovery window, contact your vet to rule out complications like sinusitis or pneumonia.
| Condition | Cough Type | Runny Nose | Other Clues |
|---|---|---|---|
| Kennel Cough | Dry, honking, persistent | Often clear discharge | Sneezing, eye discharge, recent dog exposure |
| Canine Cold (Bordetella or virus) | Moist cough possible | Thick discharge more common | Lethargy, fever, sneezing |
| Allergies | Rare (more sneezing than cough) | Clear, watery discharge | Itchy skin, seasonal pattern, no fever |
The Bottom Line
A runny nose is a real — but not universal — part of kennel cough. If your dog has the classic hacking cough plus clear nasal discharge, that fits the expected picture, especially if sneezing or reverse sneezing shows up too. Most cases run their course within 7 to 10 days with rest and gentle home care.
Your veterinarian can help distinguish kennel cough from other respiratory issues like allergies or a foreign body in the nose — particularly if your dog is very young, very old, or has a history of respiratory problems. A single exam and sometimes a quick swab can give you the certainty you need.
References & Sources
- AVMA. “Canine Infectious Respiratory Disease Complex Kennel Cough” Kennel cough, formally known as Canine Infectious Respiratory Disease Complex (CIRDC), is a highly contagious respiratory condition in dogs.
- Allkindsvet. “Kennel Cough” A runny nose is a secondary symptom of kennel cough, as the infection affects the upper respiratory system.