Most of the time, you should not be able to hear your cat breathing. Cats are naturally quiet breathers, and a healthy cat at rest takes about 15 to 30 breaths per minute with little to no audible sound. If you can hear your cat’s breathing consistently, especially when they’re awake and relaxed, something is worth investigating. That said, there are a few situations where audible breathing is perfectly harmless.
What Quiet, Normal Breathing Looks Like
A healthy cat breathes through its nose with its mouth closed. The chest rises and falls gently, and you typically can’t hear anything unless you put your ear right next to the cat’s face. Studies of healthy adult cats found a median sleeping respiratory rate of about 19 breaths per minute, while awake resting rates sit around 25 to 27 breaths per minute. At these rates, breathing is smooth, rhythmic, and essentially silent.
To get a baseline for your own cat, count the number of times their chest rises during a 30-second window while they’re sleeping, then double it. Anything consistently under 30 breaths per minute is considered normal. This number matters because it gives you a reference point: if your cat’s breathing ever becomes audible and fast at the same time, you’ll know something has changed.
When Audible Breathing Is Harmless
There are a handful of situations where hearing your cat breathe is not a concern.
Sleep snoring from position. When your cat curls up tightly or tilts their head at an odd angle, it can slightly obstruct airflow and produce a soft snore. This is the feline equivalent of you snoring when you sleep on your back. If the sound only happens in certain positions and disappears when your cat shifts, it’s benign.
Purring overlap. Sometimes what sounds like noisy breathing is actually a quiet purr blending with normal respiration. If the sound is rhythmic and only happens when your cat is relaxed or being petted, purring is the likely explanation.
Brief panting after exertion or stress. Cats occasionally pant with an open mouth after intense play, during a car ride, or in hot weather. This type of panting should stop within a few minutes once the cat rests or calms down. If it does, it’s a normal response.
Flat-Faced Breeds Are the Exception
If you have a Persian, Exotic Shorthair, or Himalayan, some degree of audible breathing may be their normal. These brachycephalic (short-nosed) breeds have compressed airways, narrowed nostrils, and sometimes an elongated soft palate, all of which increase airflow resistance and create what veterinarians call “stridulous breathing,” a low, slightly noisy quality to regular breaths.
Research published in PLOS One confirmed that brachycephalic cats are significantly more likely to have substantial breathing noise compared to cats with standard facial structure. The flatter the face, the more pronounced it tends to be. So if your Persian has always had slightly audible breathing, that’s likely their baseline. The key is noticing any change from that baseline, like the sound getting louder, more labored, or accompanied by new symptoms.
Types of Abnormal Breathing Sounds
Not all noisy breathing sounds the same, and the type of sound can tell you a lot about where the problem is.
Stertor is a low-pitched snoring or snorting sound, usually heard when the cat breathes in. It points to an obstruction in the nose or the back of the throat. Common causes include nasal polyps (non-cancerous growths), swollen nasal tissue from infection, or masses blocking the airway.
Stridor is a higher-pitched, harsher sound, also heard on inhalation. It signals a problem at the level of the voice box or upper windpipe. Laryngeal disease is rare in cats, but when it occurs, stridor is one of the hallmarks.
Wheezing is a whistling or rattling sound that often occurs during exhalation. It originates deeper in the lungs and is strongly associated with bronchial disease, including feline asthma and chronic bronchitis.
If you’re unsure which sound you’re hearing, try recording it on your phone. A short audio clip can be extremely useful for your vet.
Common Causes of Noisy Breathing
Upper Respiratory Infections
The most frequent reason a cat suddenly becomes a noisy breather is a viral upper respiratory infection. Feline herpesvirus and calicivirus are the usual culprits. These infections cause nasal congestion, sneezing, and discharge from the nose or eyes, much like a human cold. The congestion alone can make breathing audible, especially at night. Most cases resolve within one to three weeks, though severe infections can make breathing genuinely difficult.
Feline Asthma
Asthma affects a notable number of cats and produces wheezing, coughing, and rapid breathing. One of the trickiest things about feline asthma is that the coughing episodes look almost identical to a cat trying to hack up a hairball: the cat crouches low, extends their neck, and makes repeated gagging or hacking sounds. If your cat does this regularly but rarely produces an actual hairball, asthma is worth considering. Episodes can range from mild wheezing to full open-mouth breathing.
Obesity
Overweight cats are more likely to snore and breathe audibly, even while awake. Extra fat around the neck narrows the airway, making it harder for air to pass quietly. If your cat has gradually become a louder breather as they’ve gained weight, the two are likely connected. Weight management is one of the most effective ways to reduce this type of noisy breathing.
Nasal Polyps or Growths
Polyps are non-cancerous growths that can develop in the nasal passages or the back of the throat. They physically block airflow and produce a persistent snoring or congested sound. Cats with polyps often also sneeze frequently, have chronic nasal discharge (sometimes bloody or pus-like), and may eat less because their sense of smell is reduced.
Red Flags That Need Prompt Attention
Some breathing patterns signal a genuine emergency. Open-mouth breathing in a cat that is not exercising, overheated, or visibly stressed is always abnormal. Unlike dogs, cats do not routinely pant, so sustained open-mouth breathing means the cat is struggling to get enough air.
Other warning signs include breathing with visible belly effort (the abdomen pumping in and out), extending the head and neck forward as if gagging, flared nostrils, and a resting or sleeping respiratory rate consistently above 30 breaths per minute. Texas A&M’s veterinary teaching hospital specifically flags rates above 30 during rest or sleep as abnormal, and when combined with other symptoms, potentially an emergency.
Panting that doesn’t resolve within a few minutes of rest is another red flag. While brief panting after play is fine, prolonged open-mouth breathing can point to heart disease, fluid in the lungs, airway blockages, or severe pain. Cats are exceptionally good at hiding illness, so by the time breathing trouble is obvious, the problem is often already significant.
How to Monitor Your Cat’s Breathing at Home
The single most useful thing you can do is learn your cat’s normal resting breathing rate while they’re healthy. Count chest rises for 30 seconds during sleep, double the number, and write it down. Do this a few times over a week to establish a range. For most cats, you’ll land somewhere between 15 and 25 breaths per minute.
Once you know the baseline, any sustained increase becomes easy to spot. A sleeping rate that climbs above 30 on multiple checks, or breathing that becomes audible when it wasn’t before, gives you concrete information to share with your vet rather than a vague sense that something seems off. Tracking changes over days rather than reacting to a single measurement gives the clearest picture.