Dog Runny Nose: Allergies, Cold, or Infection? (When to See a Vet)

A runny nose in your dog can be alarming, leaving you wondering if it’s a minor issue or something that requires veterinary attention. Just like humans, dogs can experience nasal discharge for a variety of reasons, ranging from allergies to more serious infections.

Common Causes of Runny Nose in Dogs

Allergies

Environmental allergies, such as pollen, dust mites, and mold, are frequent culprits behind nasal discharge in dogs. Allergic reactions can cause inflammation in the nasal passages, leading to a clear, watery discharge. Other allergy symptoms may include sneezing, itchy skin, and watery eyes.

Common Cold (Kennel Cough)

While dogs don’t get the human common cold, they can contract kennel cough, a highly contagious respiratory infection. Kennel cough often results in a hacking cough, but can also produce a clear to slightly cloudy nasal discharge. This is more prevalent in environments where dogs are in close proximity, like kennels or dog parks.

Upper Respiratory Infections (URIs)

Bacterial or viral infections can cause more significant upper respiratory infections in dogs. These infections often lead to a thicker, discolored nasal discharge that can be yellow, green, or even bloody. URIs are often accompanied by other symptoms like fever, lethargy, decreased appetite, and difficulty breathing.

Foreign Object

Sometimes, a dog’s runny nose can be the result of a foreign object lodged in their nasal passage. This can be anything from a grass seed to a small piece of debris. This often causes sneezing, pawing at the nose, and nasal discharge, which can sometimes be bloody.

Nasal Tumors or Polyps

While less common, nasal tumors or polyps can also cause chronic nasal discharge. These growths can obstruct the nasal passages, leading to inflammation and discharge. The discharge is often unilateral (from one nostril) and may contain blood.

When to See a Vet

While a clear, watery discharge accompanied by sneezing might resolve on its own, certain symptoms warrant a visit to the veterinarian. Seek veterinary attention if you observe any of the following:

• Colored Nasal Discharge: Yellow, green, or bloody discharge indicates a possible infection or a more serious underlying issue.
• Difficulty Breathing: Labored breathing, wheezing, or open-mouth breathing are signs of respiratory distress and require immediate veterinary care.
• Lethargy and Decreased Appetite: If your dog is unusually tired and not eating, it could be a sign of a systemic infection.
• Unilateral Discharge: Discharge only coming from one nostril can point to a foreign object or nasal mass.
• Chronic or Persistent Discharge: If the runny nose persists for more than a few days, it’s best to get it checked out.
• Facial Swelling or Pain: Swelling or pain around the nose or face can suggest a more serious condition.

Your veterinarian will conduct a physical examination and may recommend diagnostic tests like blood work, nasal swabs, or imaging (X-rays or CT scans) to determine the underlying cause of your dog’s runny nose. Treatment will vary depending on the diagnosis, and could range from antihistamines for allergies to antibiotics for bacterial infections.

Prompt veterinary care is essential for diagnosing and treating the cause of your dog’s runny nose, ensuring their comfort and preventing potential complications.