TL;DR: Expiratory wheezing in cats is a sign of narrowed airways and often requires urgent veterinary care, especially if accompanied by open-mouth breathing or blue gums.
What does it mean if my cat is wheezing when they breathe out?
Wheezing during exhalation is a high-pitched whistling sound produced when air is forced through narrowed or constricted lower airways. In cats, this is often a sign that the small tubes in the lungs, known as bronchi, are inflamed or obstructed. This symptom is most commonly associated with feline asthma, allergic bronchitis, or potentially more serious conditions like congestive heart failure.
Is it an emergency if my cat is wheezing?
- Loud wheezing is considered a high-urgency medical situation because cats often mask respiratory discomfort until it becomes critical.
- Your cat needs to be seen by an emergency veterinarian immediately if wheezing is accompanied by "panting" (open-mouth breathing), blue-tinged gums, or a hunched posture with the neck extended.
How can a video of my cat breathing help the veterinarian?
- If it is safe to do so without delaying your trip to the clinic, capturing a 10-second video of your cat breathing can be life-saving.
- A video allows a veterinarian to observe the "effort" of the breath and whether the cat is using its abdominal muscles to push air out.
- Seeing the exact rhythm and sound helps the medical team prioritize your cat for immediate oxygen therapy upon arrival.
Clinical Context (Merck Veterinary Manual)
In emergency triage, cats presenting with loud wheezing during exhalation suggest small airway obstruction, potentially due to asthma, anaphylactic reactions, or bronchial obstruction from edema, mucus, exudates, or foreign material. Clinical signs include labored breathing with an expiratory push of the diaphragm, anxiety, and possible cyanosis. Auscultation reveals high-pitched wheezes throughout the lung field. Cats may exhibit postural changes such as sitting crouched with the sternum slightly elevated. Severe, life-threatening situations manifest as open-mouth breathing, collapse, and asphyxiation. Unconscious, apneic animals require immediate tracheal intubation to relieve the obstruction.
Chapter: Emergency, Anesthesiology, Respiratory
Source: The Merck Veterinary Manual, 11th Edition (Page 1662)