TL;DR: Dog wheezing is often caused by airway inflammation and requires a veterinary exam within 48 hours, but blue gums or gasping represent a life-threatening emergency.
What causes wheezing in dogs and how can I identify it?
While true bronchial asthma is more common in cats, dogs can experience very similar respiratory distress symptoms often referred to as allergic bronchitis or infectious tracheobronchitis. Wheezing occurs when the small airways in the lungs become inflamed or constricted, making it difficult for air to flow freely. This results in a high-pitched whistling sound, coughing, or visible effort during exhalation.
When is dog wheezing considered a veterinary emergency?
- Medium Urgency: If your dog is wheezing but is still alert, active, and has pink gums, you should schedule a veterinary appointment within 24 to 48 hours.
- Life-Threatening Emergency: If the wheezing is accompanied by blue-tinted gums, gasping for air, or collapse, go to an ER clinic immediately.
How does capturing a video of my dog help the veterinarian with triage?
- Respiratory episodes often happen in bursts and may stop by the time you reach the vet.
- Capturing a clear video allows your veterinarian to observe the specific sound and the posture of the dog.
- A recording helps the vet determine if the effort is on the inhale or exhale, which distinguishes between asthma-like conditions, heart issues, or a collapsed trachea.
Clinical Context (Merck Veterinary Manual)
In dogs presenting with asthma-like wheezing attacks, potential causes involving large airway pathology include foreign bodies, edema, laryngeal paralysis or paresis, tracheal collapse, elongated soft palate, aspiration of stomach contents, neoplasia, and pharyngeal hematomas. Severe small airway obstruction manifests as labored breathing with an expiratory push of the diaphragm, cyanosis, anxiety, and high-pitched wheezes throughout the lung field. Anaphylactic reactions, bronchial obstruction from edema, mucus, exudates, or foreign material can also cause similar signs. Severe bronchitis may present with inspiratory crackles and expiratory wheezes, potentially progressing to pneumonia. During triage, unconscious, apneic animals require immediate tracheal intubation, and any identified airway obstruction must be promptly relieved.
Chapter: Emergency, Anesthesiology, Respiratory
Source: The Merck Veterinary Manual, 11th Edition (Page 1662)