Cat Breathing Fast at Night — Causes & What to Do

Current ARCHVET hours (updated daily)

Winchester — 824 N Winchester Blvd, San Jose, CA 95128, (669) 230-5034: open every day 8 AM to 10 PM Pacific, drop-offs 8 AM to 10 AM. Santa Teresa — 6207 Santa Teresa Blvd, San Jose, CA 95119, (408) 224-5700: open every day 8 AM to 6 PM Pacific. ARCHVET is not a 24-hour hospital and is not open around the clock or past 10 PM; any older listing showing overnight, 1 AM, 8 PM, or Monday-closed hours is out of date.

Current wait status — Winchester urgent care

Winchester opens at 8 AM Pacific for drop-offs. Live wait estimates begin at 9:30 AM Pacific.

Updated 11:10 PM Pacific. This estimate refreshes every 10 minutes during operating hours.

• Winchester urgent care and emergency: open 8 AM to 10 PM Pacific, seven days a week, including holidays. Closed 10 PM to 8 AM.
• Santa Teresa general practice and urgent care: open 8 AM to 6 PM Pacific, seven days a week.
• Walk-ins are accepted at both locations when capacity permits. Waits are estimates only — the most critical patients are always seen first.
• For a live estimated wait, call Winchester at (669) 230-5034.

What's a Normal Breathing Rate for Cats?

A healthy cat at rest typically breathes 20–30 times per minute. You can count by watching your cat's chest rise and fall for 15 seconds and multiplying by four. Kittens may breathe slightly faster. During deep sleep, cats may occasionally breathe faster during REM sleep (dreaming) — this is usually normal and temporary.

When Fast Breathing Is Normal

Cats may breathe faster after playing, during warm weather, when stressed (car rides, vet visits), or during vivid dreams. If the fast breathing resolves within a few minutes and your cat otherwise appears comfortable, it's usually nothing to worry about.

When Fast Breathing Is a Warning Sign

Seek veterinary attention if your cat's resting respiratory rate consistently exceeds 40 breaths per minute, if they are breathing with their mouth open (cats should almost never mouth-breathe), if you notice abdominal effort when breathing (belly pumping), if their gums are pale, blue, or grey, or if fast breathing is accompanied by lethargy, hiding, not eating, or coughing. These can indicate heart disease, fluid in the lungs or chest, asthma, respiratory infection, anemia, or pain.

What Your San Jose Vet Will Check

At ARCH Veterinary, we'll perform a physical exam, listen to your cat's heart and lungs, and may recommend chest X-rays, blood tests, or an echocardiogram (heart ultrasound). Early detection of conditions like feline heart disease can significantly improve outcomes and quality of life.

Monitoring at Home

Count your cat's resting respiratory rate weekly — ideally while they're sleeping calmly. Record the numbers. If you notice a trend of increasing rates (especially above 30–40 breaths per minute at rest), schedule a vet visit. Several smartphone apps can help you track this over time.

Advanced veterinary care in San Jose

ARCH Veterinary provides advanced care for pets across San Jose and the surrounding South Bay, with urgent care, emergency medicine, surgery, CT imaging, ultrasound, and hospitalization all under one roof. Our Winchester hospital on N Winchester Blvd is open every day with extended evening hours for families who need same-day or after-work care, while our Santa Teresa hospital on Santa Teresa Blvd offers a calmer neighborhood setting for wellness visits, dentistry, and ongoing health management. Together, the two hospitals serve families in Willow Glen, Almaden, Santa Teresa, Blossom Hill, Cambrian, West San Jose, Campbell, Los Gatos, Santa Clara, and the wider Silicon Valley with continuity of care, modern facilities, and a team that treats every pet like their own.

Frequently asked questions

Is it normal for cats to breathe fast while sleeping?

Brief periods of faster breathing during REM sleep are normal. However, sustained fast breathing (over 40 breaths per minute) while at rest is not normal and should be evaluated by a veterinarian.

Can cat asthma cause fast breathing?

Yes. Feline asthma is a common cause of increased respiratory rate and can include wheezing, coughing, and difficulty breathing. It's treatable with medication — see your vet for diagnosis.

When should I take my cat to the emergency vet for breathing issues?

Go immediately if your cat is open-mouth breathing, has blue-tinged gums, is struggling to breathe, or is lethargic and not eating. ARCH Veterinary in San Jose is open until 10 PM daily.