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Volume usually comes down to how much room the air has. Short muzzled breeds, a chin folded against the chest, extra weight, or a stuffy nose all shrink the passage, and a smaller passage makes a louder sound from the same breath. A cat who has always snored loudly is usually just built that way.
Why a short muzzle makes more noise
Persians, Himalayans, Exotic Shorthairs and other flat faced cats have skulls bred shorter at the front, but the soft tissue inside did not shrink to match. Nasal passages get compressed and folded into less space, and the soft palate can be relatively long for the mouth it sits in. Air squeezing through that arrangement is noisier before anything goes wrong at all.
Long muzzled cats like Siamese or ordinary domestic shorthairs tend to be quieter for the opposite reason. When one of them starts snoring loudly, owners notice, because it is a change rather than a trait.
Room acoustics fool people as well. The same cat sounds twice as loud asleep on a hardwood floor at three in the morning as it does on a rug in a busy living room. Before concluding your cat has got louder, check whether anything about where it sleeps has changed, because that is a far more common explanation than anything happening inside the cat.
What else turns the volume up
- Sleeping position. A cat curled with its chin pressed to its chest or its face buried in a blanket has kinked its own airway.
- Body weight. Extra tissue around the neck and throat presses inward on a small airway.
- Congestion. Anything swelling the nasal lining narrows an already narrow channel.
- Age. Older cats lose muscle tone the same way people do, and the tissue gets slacker.
- Dry or dusty air. Irritated nasal lining swells, which shows up as a louder night.
Loud but normal, versus loud and new
| Pattern | How to read it |
|---|---|
| Always been loud, breed is flat faced | Usually a trait |
| Loud only in one sleeping position | Usually position, try moving the cat |
| New loudness over days or weeks | Worth a vet appointment |
| Loud plus noisy breathing while awake | Call the vet |
| Loud plus discharge, sneezing, or appetite change | Call the vet |
When to call your vet about it
Book an appointment if the snoring is new and has not settled, if there is nasal discharge, sneezing, or watering eyes alongside it, if your cat is eating less or has lost weight, or if the voice has changed. Any noisy or laboured breathing while your cat is awake, and especially open mouth breathing, is a reason to contact a vet promptly rather than waiting for office hours to suit you.
Your vet will want to know when it started, how it has changed, and whether anything else changed at the same time. A short phone video of the sound is genuinely useful to bring.
