Breathing Problems in Flat-Faced Persian Cats (BOAS)

That sweet flat face is the Persian's trademark. It can also make breathing harder work. Snoring is common, but it isn't always "just how Persians sound" [1][2].

What is BOAS?

BOAS stands for brachycephalic obstructive airway syndrome. "Brachycephalic" simply means short-skulled, or flat-faced [1].

• The face bones are shorter, but the soft tissue inside the nose and throat isn't [1].
• In Persians, the main problems are narrow nostrils and a soft palate that's too long for the short mouth [1].
• Both get in the way of air moving in and out [1].

Is it contagious?

No. It comes from the shape of the head the cat is born with, not from an infection [1].

Do all Persians have it?

Not to the same degree. The flatter the face, the more the nose and throat tend to be affected, so some Persians breathe much more easily than others [1]. Himalayans and Exotic Shorthairs can have it too [1].

What signs mean "see a vet"?

Talk to a vet if your cat:

• Snores, or breathes noisily, even at rest [1].
• Breathes with its mouth open [1].
• Struggles more to breathe in heat or after playing [1][3].

Emergency: heavy panting, drooling, unusual tiredness, vomiting or collapse in hot weather are warning signs in any cat. Contact a vet immediately [3].

How can I help my Persian?

• Keep it indoors in a cool, air-conditioned, well-ventilated room during hot weather [1][3].
• Avoid hard play in the heat [1][3].
• Buying a kitten? Look for a less extreme flat face, and ask whether the parents breathe quietly at rest [1].

Did you know? In a big UK study, vets rarely recorded BOAS in Persians, likely because people treat noisy breathing as normal for the breed [2]. Noticing it is the first step.

FAQ

Is snoring normal for a Persian?

It's common, but not harmless by default. Mention it to your vet [1].

Can I fix it at home?

No. It's about the cat's anatomy, so there's no home fix. A licensed vet can advise [1].

Is it worse in Saudi summers?

Very likely. There are no Persian-specific heat studies, but heat adds strain to a narrow airway, so keep your cat cool indoors [1][3].