What really happens in your cat’s stomach?

Many owners are startled when their house cat suddenly retches up odd, elongated clumps of fur and mucus. These incidents are particularly common in spring. Although the sight is bizarre, it usually reflects a clear and harmless process in a cat’s digestive system – yet it can become problematic if no action is taken.

What really happens in your cat’s digestive system in spring

As the days become brighter and the heating is used less often, cats begin their major coat change. Their winter coat gives way to a lighter summer coat. Much of the dead hair ends up not on the sofa, but in your pet’s stomach.

Why cats swallow considerably more fur in spring

Cats spend a large part of the day grooming themselves. As they lick intensely, their rough tongues work like small combs. Even in everyday life, some hair naturally makes its way into the stomach. During the spring moult, however, this amount multiplies.

• More loose hair in the coat
• More time spent grooming
• More swallowed hair – often several grams each day

The thicker the coat and the more thoroughly a cat grooms, the greater the issue can become. Indoor cats are affected too, even if they never go outside, as their coats still respond to the seasons.

How fur becomes hairballs – and why cats bring them back up

Some swallowed hair travels through with food and is passed in the faeces. However, if too much collects at once, the intestines cannot always move it all along without difficulty.

In the stomach and upper intestinal tract, the hairs combine with food remnants and mucus to form compact, often cigar-shaped masses. The technical term is trichobezoars; in everyday language, they are simply called hairballs.

“When the intestines are overloaded, the body goes into reverse: the hairball is moved upwards and eventually retched up.”

This is why the usual sequence looks as it does: retching sounds, a tensed abdomen, followed by a long, damp mass – sometimes dry and sometimes covered in mucus.

When hairballs become dangerous for your cat

An occasional fur clump being retched up is normal for many cats. It becomes concerning when the symptoms occur more frequently or when a hairball blocks the intestine. Common warning signs include:

• frequent vomiting, even when no hairball appears
• lethargy, hiding away or noticeably less play
• altered bowel movements or no faeces being passed
• constipation or very small, hard stools
• reduced appetite or complete refusal of food
• obvious abdominal pain or resistance when being touched

If any of these signs persist, or your cat generally seems “not like itself”, veterinary help is needed. A lodged hairball can narrow the intestine so severely that surgery is the only solution.

Brush instead of retching: easing the burden on your cat’s stomach

The simplest preventive measure is literally in your hands: regular brushing. The more hair you remove from the coat, the less reaches the digestive tract.

Comb three times a week – a sensible minimum routine

Many owners brush their cat no more than once a week, if at all. During the coat-changing period, that is rarely enough. At least three brushing sessions a week are much more useful, while long-haired cats can ideally be brushed daily.

This guideline works for most cats:

• short fur: 2–3 times per week, preferably 3 times in spring
• medium-long fur: 3–4 times per week
• long fur: daily or every other day

Even short-haired cats benefit. Many enjoy the attention once they have been introduced to it gradually.

Suitable tools and tips for stress-free brushing

Choose brushes and combs designed specifically for cats. Popular options include:

• soft grooming brushes with rubber bristles
• textured gloves that “wipe away” loose hair
• fine combs for dense or long coats

A gentle approach matters: brush in the direction of hair growth, take care around sensitive areas and keep each session brief. Many cats accept brushing more readily when it initially lasts only a few minutes.

“Reward every brushing session with a treat or a cuddle – and a chore will soon become a ritual.”

Benefits beyond fewer hairballs

Routine brushing does more than lower the risk of fur clumps in the stomach. It:

• supports healthy, well-circulated skin
• reduces loose hair on sofas and clothing
• helps you spot small injuries, ticks or knots in the coat early
• strengthens the bond between cat and owner

Many owners report that their cats seem more relaxed after brushing and groom themselves less frantically.

Food as support: how diet can prevent hairballs

You cannot stop your cat from grooming. However, you can make the digestive system’s job easier, helping swallowed hairs pass through more quickly and without trouble.

How malt paste and fibre support the intestines

Malt paste, available from pet retailers, acts rather like a lubricant in the intestines. It coats the hairs and helps them travel towards the exit. Many cats willingly lick it because it has a mildly sweet taste.

Fibre such as psyllium husks works differently: it binds water, increases stool volume and thereby stimulates intestinal movement. The hairs are effectively carried along and are less likely to form solid clumps.

“The combination of regular brushing, a little malt paste and moderate fibre significantly reduces the risk of problematic hairballs.”

How to add psyllium and similar products safely to the feeding plan

If you want to give your cat fibre, introduce it carefully. Suitable options include:

• mixing a small pinch of psyllium into wet food
• choosing dry or wet food specifically advertised as having a higher fibre content
• offering malt paste two to three times a week, for example as a small dab on a paw

For most cats, around a quarter of a teaspoon of psyllium per day is enough during the moulting period. One point is crucial: always provide plenty of water, as fibre without sufficient liquid can slow things down rather than help. If you are unsure, a vet should assess the appropriate amount.

The right timing: why you should start as early as March

Many hairball problems occur because owners only react once their cat has already retched several times. Starting early is more sensible. As soon as the days become noticeably longer – often from mid-March – it is worth checking the coat.

If you notice more loose hair in the brush or on clothing, it is time to:

• increase how often you brush
• introduce malt paste gradually
• choose high-fibre food if appropriate

Beginning these measures early takes the pressure off the gastrointestinal tract before large amounts of hair can build up.

Other factors: when hairballs indicate a bigger issue

Some cats suffer more with hairballs because another problem is involved. Overweight animals often groom themselves less effectively, which makes their coat more prone to matting and can lead them to swallow larger tufts. Skin conditions and parasites such as fleas may also increase the urge to groom.

If you suddenly notice far more hairballs from your cat, do not only think about brushing; check the following points too:

• weight: is your cat overweight or underweight?
• skin condition: redness, dandruff or bald patches?
• parasite control: is flea or mite treatment up to date?
• stress factors: moving home, new animals, noise or boredom?

Stress can lead cats to groom excessively. This raises the amount of hair in the digestive tract, even outside the moulting season. In these cases, it helps to adapt the home environment, provide more activity and create safe places to retreat.

How to recognise hairballs – and what is normal

Hairballs rarely look genuinely “ball-shaped”. They usually resemble long sausages instead, because they take on the shape of the oesophagus. They may:

• appear brown, grey or black
• be dry or surrounded by mucus
• contain food remnants

If your cat only occasionally retches up such a clump and then behaves normally, eats, plays and has unremarkable stools, there is usually no reason to panic. If the episodes become more frequent or occur alongside other symptoms, professional assessment is required.

Knowing your cat’s signals, brushing regularly and supporting its digestive system with an appropriate diet can significantly reduce the risk of serious complications. This keeps spring a season in which moulting is visible but not dangerous for both pet and owner – and strange sausage-like objects on the carpet remain a rare exception.