Cat Hairballs

Cat Hairballs: What’s Normal, What’s Not, and When to Worry 🐱✨

By Dr Duncan Houston

🔎 Quick Answer

Hairballs are common in cats, especially long-haired cats and heavy groomers, but they should not be happening constantly. Occasional hairballs can be normal, while frequent gagging, repeated vomiting, weight loss, appetite changes, or straining without producing a hairball are signs your cat needs a veterinary check.

That lovely 3 AM soundtrack of dramatic retching followed by a warm tube of fur on the carpet. Classic cat behaviour. Not appreciated, but classic.

Hairballs are common, but they are also one of those things people sometimes normalise too much. A cat bringing up the occasional hairball is one thing. A cat repeatedly gagging, vomiting, or struggling to pass hair through the digestive tract is another.

So let’s sort out what is normal, what is not, and when a hairball may actually be a clue that something else is going on.

🧶 What Exactly Is a Hairball?

A hairball, or trichobezoar, is a clump of swallowed hair that collects in the digestive tract and is then vomited back up.

Because cats groom by licking their coat, they swallow fur regularly. Most of that fur passes through the intestines without any drama. But sometimes some of it stays behind, bunches together, and gets brought back up.

Hairballs are usually:

• cylindrical rather than round

• made mostly of fur

• sometimes mixed with food, mucus, or bile

That sausage shape is because it forms in the oesophagus on the way back up, not because your cat is out there crafting fur cigars for fun.

📈 What’s Considered Normal?

An occasional hairball can be normal.

For many cats:

• 1 to 2 hairballs per month can fall within the normal range

• long-haired cats may have them a bit more often

• shedding seasons can temporarily increase frequency

What is not normal:

• repeated gagging with no hairball produced

• hairballs happening multiple times a week

• vomiting frequently

• appetite loss

• weight loss

• constipation or diarrhoea

• lethargy or hiding

The key point is this: hairballs should be occasional, not a regular lifestyle choice.

🕵️ Why Some Cats Get More Hairballs

Some cats are just more prone to them.

Common reasons include:

🧹 Heavy Grooming

Cats that groom excessively swallow more hair. This can happen with:

• stress

• boredom

• skin allergies

• parasites

• pain

• compulsive grooming behaviours

🐈 Long Hair

Long-haired breeds like Persians, Maine Coons, and Ragdolls naturally swallow more fur.

🍽️ Diet

Some cats benefit from diets that support gut motility and help fur move through the digestive system more easily.

🩺 Underlying Digestive Disease

If the gut is not moving properly, hair can accumulate instead of passing through. Gastrointestinal disease, inflammation, constipation, or motility problems can all contribute.

That is why frequent “hairballs” are not always just hairballs.

🚨 When to Worry

This is the section cat owners need most.

See a vet if your cat has:

• gagging or retching without bringing anything up

• frequent vomiting

• more than 2 hairballs per week

• poor appetite

• weight loss

• lethargy

• constipation

• diarrhoea

• abdominal discomfort

• vomiting foam or bile regularly

Why?

Because not every cat that looks like they are trying to bring up a hairball actually has one.

Sometimes the problem is:

• asthma

• nausea

• intestinal disease

• foreign material

• constipation

• pancreatitis

• an intestinal blockage

And in more serious cases, swallowed hair can contribute to a blockage, which can become an emergency.

🧼 How to Reduce Hairballs at Home

1. Brush Regularly

This is one of the best things you can do.

Daily brushing is ideal for long-haired cats. Even short-haired cats benefit during shedding periods.

Less loose hair on the coat means less hair swallowed.

2. Improve Coat and Skin Health

A healthy coat sheds better and may reduce excessive grooming.

This means:

• good nutrition

• parasite control

• managing allergies

• addressing skin irritation early

3. Support Gut Movement

Some cats do better with:

• hairball-control diets

• added fibre

• increased wet food intake

• better hydration

In some cases, vets may recommend small amounts of fibre such as pumpkin or psyllium, but only if appropriate for that cat.

4. Use Hairball Remedies Carefully

Lubricant-style hairball products can help some cats pass swallowed fur more easily.

These can be useful, but they are not a fix for a cat that is vomiting all the time or has an underlying illness.

5. Reduce Stress

Stress grooming is real.

If your cat has been over-grooming because of:

• household changes

• boredom

• new pets

• visitors

• lack of hiding spots

then addressing the stress matters just as much as addressing the fur.

Vertical space, safe hideaways, toys, and routine can all help.

🩺 When a Hairball Needs a Vet Check

A proper veterinary check is important when hairballs become frequent, because the real issue may be the reason your cat is swallowing or failing to pass so much hair in the first place.

Your vet may recommend:

• a physical exam

• weight and body condition assessment

• skin and coat evaluation

• abdominal palpation

• blood tests

• imaging if blockage or GI disease is a concern

That is especially important if your cat is older, losing weight, or vomiting more often than usual.

😼 Hairball or Something Else?

This is where cats love to keep life interesting.

Some things that look like hairballs are actually:

• asthma coughing

• nausea

• reflux

• intestinal discomfort

• repeated vomiting from another disease

A video of the episode can be incredibly helpful, because coughing and gagging get mixed up all the time.

If your cat is crouching, extending the neck, and making repeated effort without producing a hairball, it is worth getting that checked.

💬 Final Thoughts

Hairballs are common, but they should not be constant.

An occasional hairball is usually not a big deal. A cat that is repeatedly gagging, vomiting, losing weight, or acting off deserves a closer look.

The best hairball plan is usually simple:

• brush more

• support gut health

• reduce stress

• stop assuming every retch is “just a hairball”

Because sometimes it is.
And sometimes it really, really isn’t.

❓ FAQ

How many hairballs are too many?

More than about 2 per week is excessive, especially if your cat also has appetite changes, weight loss, or repeated gagging without producing one.

Can hairballs make my cat vomit?

Yes, but frequent vomiting is not something to brush off. It can also point to gastrointestinal disease, nausea, or other medical problems.

Do hairball-control diets actually help?

They can help some cats by improving fibre intake and gut motility, but brushing and coat management are still key.

Why is my cat gagging but not bringing up a hairball?

That can happen with hairballs, but it can also happen with asthma, nausea, GI disease, or an obstruction. If it keeps happening, your cat should be checked by a vet.

Are long-haired cats more prone to hairballs?

Yes. Long-haired cats generally swallow more fur and are more likely to develop recurrent hairballs.

If your cat is gagging, vomiting, or having more hairballs than feels normal, the ASK A VET™ app can help you work out whether it looks like a simple hairball issue or something that needs a proper check sooner rather than later.