Key Takeaways
- Feline asthma affects 1-5% of cats, and the single biggest reason it goes undiagnosed for months is owners assuming the cough is a hairball.
- A hairball is a stomach event — your cat vomits it up. Coughing is a breathing event. They use different muscles and come from different body systems.
- A survey cited by the American Association of Feline Practitioners found 73% of short-haired cats never brought up a hairball at all, so a weekly "hairball" is not normal.
- More than one or two hairballs a month, or a sudden jump in frequency, is a reason to book a vet visit.
- Frequent hairballs can also flag inflammatory bowel disease, food intolerance, anxiety, or — rarely — intestinal lymphoma.
- If asthma is confirmed, inhaled medication such as fluticasone (sold in Australia as Flixotide) is delivered through a spacer chamber straight to the lungs, with far less whole-body exposure than steroid tablets.
Most hairballs are normal — but if your cat does the crouch-and-hack routine more than twice a week and nothing comes out, that is not a hairball problem. It is a cough, and it may be feline asthma. An informal survey published by the American Association of Feline Practitioners (Cat Friendly Homes) found 73% of short-haired cats never brought up a hairball in a year, so recurring "hairball" episodes are worth a second look; if your vet confirms asthma, fluticasone (sold in Australia as Flixotide) is delivered through a spacer chamber such as Neobay's, straight to the lungs where the problem is.
What Is a Hairball? And No, It's Not Actually a "Ball"
The name is misleading. A hairball — technically a trichobezoar — isn't round. It's a compact, cigar-shaped tube of fur mixed with digestive fluid. It forms in the stomach, not the lungs, which is why the whole idea of "coughing up" a hairball is medically inaccurate.
Here's what happens: cats groom themselves constantly. Their tongue has backward-facing barbs called papillae that trap loose fur. Most of that fur passes straight through the digestive tract and leaves in the stool. But some collects in the stomach, mats together, and eventually triggers a vomiting reflex.
The cat vomits the hairball. Not coughs it up. Vomits.
This distinction is the foundation of everything that follows. Hairball expulsion is a GI event — the stomach contracting to eject its contents through the oesophagus and out the mouth. Coughing is a respiratory event — the airways constricting, the diaphragm spasming, the body trying to clear something from the lungs or trachea.
They use different muscles. They come from different body systems. And confusing the two is the single most common reason feline asthma goes undiagnosed for months or years.
How Many Hairballs Are Actually Normal?
Let's start with the baseline most cat owners get wrong.
An informal survey published by the American Association of Feline Practitioners (Cat Friendly Homes) found that 73% of short-haired cats never brought up a hairball in a year. Long-haired cats were roughly twice as likely to vomit hairballs, but even among them, frequent hairballs were not the majority experience.
Here's what veterinary consensus says:
| Frequency | Assessment | Action |
|---|---|---|
| A few times per year | Normal | No action needed |
| 1-2 times per month | High end of normal, but worth monitoring | Increase brushing, watch for other symptoms |
| Once a week or more | Abnormal | Vet visit warranted |
| Sudden increase in frequency | Red flag | Vet visit — don't wait |
| Daily or near-daily | Serious problem | Could indicate IBD, lymphoma, or an obstruction |
A cat vomiting hairballs every week is not "just a hairy cat." That cat has either an excessive hair intake problem, a GI motility problem, or both. Something is preventing the normal passage of ingested fur through the digestive tract.
My cat brings up a hairball every week — is that normal?
No. Most healthy cats should not vomit hairballs weekly, and most short-haired cats never bring one up at all. One or two a month is the high end of normal. More than that, or a sudden increase, is worth a vet visit rather than a "hairball-control" diet alone.
Why Some Cats Get More Hairballs
Long-haired breeds — Persians, Maine Coons, Himalayans, Ragdolls — simply swallow more fur per lick. Longer coat, more shedding, more ingested.
Heavy groomers — cats who groom compulsively from anxiety, boredom, or pain. Stress-grooming can double or triple normal fur intake.
Skin conditions — flea allergies, food allergies, mites, ringworm. Anything that makes a cat itchy makes them groom more.
Seasonal shedders — spring and autumn coat changes temporarily increase the loose-fur load. A seasonal uptick in hairballs is normal.
Older cats — age-related GI slowdown means ingested fur sits in the stomach longer, increasing the chance of matting into a mass.
Cats with GI disease — chronic inflammation from IBD or food intolerance reduces motility. Hair sits in the stomach instead of moving through.
When Frequent Hairballs Signal Something Serious
This is what many primary-care vet visits miss. The hairball isn't the problem — it's a visible symptom of a problem further up the chain.
Inflammatory Bowel Disease (IBD)
IBD is chronic inflammation of the GI tract. It thickens the intestinal wall, slows motility, and makes the stomach and intestines less effective at moving contents through. Hair that would normally pass in the stool accumulates in the stomach instead. The cat vomits it. The owner thinks "hairball problem." The real problem is IBD, and without treatment, it progresses.
Intestinal Lymphoma
Small-cell intestinal lymphoma in cats is insidious. Early symptoms look exactly like IBD — intermittent vomiting, weight loss, occasional diarrhoea, more frequent hairballs. The vomiting is the same. The hairballs are the same. But the underlying disease is cancer.
There is no way to tell IBD from early lymphoma without a biopsy. If your cat's hairball frequency increases and doesn't respond to dietary or grooming changes, don't let your vet stop at "hairball cat." Ask for blood work, an abdominal ultrasound, and a GI panel at minimum.
Food Intolerance or Allergy
Cats can develop food sensitivities at any age. The most common reaction isn't hives or itching — it's chronic GI inflammation and vomiting. A cat with an undiagnosed food intolerance may produce more hairballs because their stomach isn't processing contents normally, not because they're grooming more.
Anxiety and Over-Grooming
Psychogenic alopecia — over-grooming driven by stress — can produce bald patches, skin irritation, and a huge increase in swallowed fur. The cat isn't itchy. The skin isn't irritated. The behaviour is compulsive. Common triggers: a new pet, a move, a change in routine, construction noise, a new baby, an owner returning to the office after working from home.
The hairballs are the visible symptom. The actual problem is anxiety.
The Critical Mistake: Thinking Asthma Is a Hairball
This is the section that could change your cat's life. Read it carefully.
Feline asthma affects 1-5% of all cats. Siamese and Oriental breeds are at higher risk. And the number-one reason asthmatic cats go undiagnosed for months or years is that their owners read the coughing as "trying to bring up a hairball."
The posture is almost identical. Cat crouches. Neck extends forward. Elbows out. A rhythmic hacking motion. From across the room, it looks like the lead-up to vomiting.
But what comes after matters more than the posture:
Hairball episode: Rhythmic abdominal contractions → retching sound → hairball is brought up. Takes 10-60 seconds from start to finish. The cat walks away normally. You see fur and mucus on the floor.
Asthma cough: Repeated dry coughing, often 5-10 coughs in a row → nothing is produced. The cat may swallow afterwards (clearing saliva from the throat). The coughing may cluster through the day, especially at night or early morning. Episodes last 10-30 seconds. The cat seems normal between episodes.
Key differences:
| Sign | Hairball | Asthma |
|---|---|---|
| Something produced | Yes — fur, mucus | No — dry cough |
| Sound | Wet, retching, gurgling | Dry, hacking, wheezy |
| Frequency | Variable; tied to grooming | Often daily; tied to triggers (exercise, dust, smoke, stress) |
| After the episode | Cat walks away, normal | May stretch neck, swallow, then resume normal activity |
| Timing | Random | Common at night or early morning |
| Response to treatment | Reduced by brushing, hairball remedies | Not affected by grooming or diet; responds to corticosteroids |
Asthma flare-ups are usually driven by inhaled allergens — in Australia, pollen as well as bushfire smoke. RSPCA Australia notes cats with a respiratory condition are most at risk when the air is smoky.
My cat crouches and hacks but nothing comes out. Hairball or asthma?
Treat it as a cough, not a hairball. Retching that produces a hairball ends with fur on the floor; asthma produces nothing and often repeats in a pattern. If it happens more than twice a week with nothing on the floor, that is asthma until proven otherwise — film it and ask your vet for chest X-rays.
The "Nothing Comes Out" Rule
If your cat goes through the coughing/crouching motion more than twice a week and never produces a hairball — that is not a hairball problem. That is feline asthma until proven otherwise.
Record a video of the episode on your phone. Show your vet. The posture, the sound, the duration — these are diagnostic clues. A 15-second phone video is worth more than a detailed verbal description.
Neobay Cat Inhaler Spacer with Breath Indicator in Australia
- See each breath with the Breath Indicator
- Built-in treat holder makes mask practice easier
- Anti-static chamber helps keep medication airborne
Why Getting This Right Matters
Untreated feline asthma causes progressive airway remodelling. Each inflammatory episode thickens the bronchial walls, making future attacks more severe. Cats who go years without treatment don't just have worse symptoms — they have permanently narrowed airways that don't fully respond to medication the way a newly diagnosed cat's would.
Asthma treatment is inhaled corticosteroids — fluticasone (sold in Australia as Flixotide) delivered through a spacer chamber, sometimes with a rescue bronchodilator (salbutamol) for breakthrough attacks. The medication goes straight to the lungs, where the problem is, with minimal systemic absorption. Far safer than long-term oral steroids. Our Australian cat inhaler spacer buyer's guide covers how to choose a chamber and a mask that fits.
For a deeper comparison, read our guide to feline asthma vs hairballs, and our article on how vets diagnose feline asthma walks through the full diagnostic process.
Hairball Prevention: What Actually Works
If your cat's hairball frequency is high but a vet workup rules out underlying disease, prevention comes down to reducing fur intake and improving GI transit. Keeping indoor air cleaner during pollen season and on smoky days also helps if your cat is prone to respiratory symptoms — RSPCA Australia advises bringing pets inside with doors and windows closed when the air is smoky.
1. Brushing (By Far the Most Effective)
The maths is simple: less loose fur on the cat = less fur swallowed.
- Short-haired cats: 2-3 times per week, daily during shedding season
- Long-haired cats: Daily, with a slicker brush or deshedding tool
- Focus on the undercoat — the soft, fine fur that mats and sheds most
A 5-minute brushing session removes more dead fur than a week of self-grooming. If you do nothing else, do this.
2. Diet: Fibre and Moisture
High-fibre cat foods add bulk to the stool and help ingested hair pass through instead of accumulating. "Hairball control" formulas (Hill's, Royal Canin, Purina ONE) achieve this with cellulose, beet pulp, or psyllium.
Wet food adds moisture, which improves GI motility. Dry food alone — especially for cats who don't drink much water — can contribute to slower gastric emptying. Even adding a tablespoon of water to dry kibble helps.
3. Hairball Lubricant Gels
Laxatone, Petromalt and similar products contain petrolatum or mineral oil that coats the stomach contents and helps hair slide through. A pea-sized amount on the cat's paw once or twice a week.
These are safe for occasional use, but they treat the symptom, not the cause. If you're reaching for the Laxatone tube every other day, your cat needs a veterinary workup, not more gel.
4. Environmental Enrichment
A stressed cat grooms more. Environmental enrichment — puzzle feeders, window perches, regular play sessions, a consistent daily routine — reduces anxiety-driven over-grooming. For cats with diagnosed anxiety, Feliway diffusers and prescription anti-anxiety medication are options.
5. Professional Grooming
Long-haired cats benefit from a "lion cut" (body shaved short, leaving fur on the head, legs and tail) 2-3 times per year during shedding season. It looks dramatic, but it works. Less fur on the cat means less fur in the cat.
When to See the Vet Immediately
Most hairball situations are not emergencies. These are:
- Repeated, unproductive retching for more than a few minutes — could be a hairball lodged in the oesophagus or a GI obstruction
- Complete appetite loss for 24+ hours with or without vomiting
- Lethargy, hunched posture, or hiding — signs of abdominal pain
- Swollen or tender belly when touched
- Constipation or straining in the litter box with no stool produced
- Vomit that looks like coffee grounds — digested blood, a true emergency
- Any breathing difficulty — open-mouth breathing, panting, blue gums
A hairball obstruction is a surgical emergency. Don't "wait and see" on these symptoms.
Frequently Asked Questions
How many hairballs a week is normal?
Zero. Most healthy cats should not vomit hairballs weekly. One or two per month is the high end of normal. More than that, or any sudden increase, warrants a vet visit.
Can hairballs cause coughing in cats?
No. Hairballs sit in the stomach and GI tract — they cause retching, gagging and vomiting, not coughing. Coughing is a respiratory symptom. If your cat makes a hacking sound and nothing comes out, that's a cough, not a hairball problem.
What's the difference between a hairball cough and an asthma cough?
A hairball doesn't cause a cough — it causes retching that ends with something being brought up. An asthma cough is dry, repeated, produces nothing, and the cat goes back to normal straight after. If the sessions end with fur on the floor, that was a hairball. If they never do, think asthma.
When should I worry about cat hairballs?
Worry when frequency exceeds once a month, when there's a sudden increase, when the cat retches repeatedly without producing anything, or when hairballs come with appetite loss, weight loss, lethargy, diarrhoea or constipation. Frequent hairballs are a symptom, not a standalone condition.
Why is my cat throwing up hairballs every day?
Daily hairballs are abnormal and point to either excessive fur intake (anxiety, skin disease, seasonal shedding) or a GI motility disorder (IBD, food intolerance, early lymphoma). This cat needs blood work, an abdominal ultrasound, and possibly an endoscopy — not just a hairball-control diet.
Do some cats never get hairballs?
Yes. Most short-haired cats never vomit a hairball. The idea that "all cats get hairballs" is wrong. Some cats pass all ingested fur in their stool without an issue. If your cat has never produced a hairball, that's actually the normal experience for most cats.
What to Do Next
Count. Track your cat's hairball frequency for the next 30 days. Write down the dates. If it's more than twice in a month, book a vet appointment.
Record. The next time your cat does the crouch-hack routine, video it on your phone. Show it to your vet. A 15-second video is the single most useful diagnostic tool for telling hairballs from asthma.
Brush. Start a daily or every-other-day brushing routine today. Five minutes. It's the single most effective prevention measure.
Look at what's on the floor. After an episode, examine what came up. A tubular mass of compacted fur with some fluid = hairball. Clear or yellow fluid with just a few strands of hair = vomit with hair, not a hairball. Nothing at all after repeated coughing = a respiratory event, not a hairball.
If your cat coughs without producing anything more than twice a week, ask your vet specifically about feline asthma. Don't let them dismiss it as "just hairballs" without at least doing chest X-rays.
A hairball every now and then is not a crisis. But confusing asthma for hairballs — and letting it go untreated for years — is. You now know the difference.
Have more questions about your cat's respiratory health? Read our guide on why cats cough after running or explore our cat breathing resource centre. You can also visit our FAQ page or contact us directly.
Sources
- Cornell Feline Health Center. "Feline Asthma: What You Need to Know." Cornell University College of Veterinary Medicine. https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information/feline-health-topics/feline-asthma-what-you-need-know
- VCA Animal Hospitals. "Asthma and Bronchitis in Cats." https://vcahospitals.com/know-your-pet/asthma-and-bronchitis-in-cats
- Batchelor DJ, et al. "Mechanisms, causes, investigation and management of vomiting disorders in cats: a literature review." Journal of Feline Medicine and Surgery, 2013; 15(4): 237-265.
- RSPCA Australia. "How can I minimise the impact of bushfire smoke on my animals?" RSPCA Knowledgebase. https://kb.rspca.org.au/categories/wild-animals/how-can-i-minimise-the-impact-of-bushfire-smoke-on-my-animals
- Vet Voice (Australian Veterinary Association). "Smoke hazards and pet health." https://www.vetvoice.com.au/articles/smoke-hazards-and-pet-health/
- Cat Friendly Homes (American Association of Feline Practitioners). "Hairballs." https://catfriendly.com/routine-care-grooming/hairballs/
Related Reading
This article is part of our Feline Rhinitis: The Complete Owner's Guide — covering the non-asthma respiratory conditions that can look similar. For the equipment side, see the Australian cat inhaler spacer buyer's guide.
