📄 Article Summary
- Shedding is a natural phenomenon in cats, triggered primarily by changes in daylight duration rather than outside temperature.
- Indoor cats exposed to artificial light year-round may shed their fur in a more diffuse and continuous manner rather than in marked seasonal waves.
- Regular brushing, suited to the coat type, significantly reduces the amount of swallowed hair and therefore the risk of hairballs (trichobezoars).
- Frequent vomiting, constipation, or loss of appetite during the shedding period can indicate an excessive accumulation of hair in the digestive tract and warrants veterinary advice.
- Localized hair loss accompanied by scratching, patches, or redness is not normal shedding and should always be examined by a veterinarian.
What is shedding in cats?
Shedding refers to the natural renewal of a cat's coat: dead hairs fall out gradually to make way for new hair better suited to the upcoming season. This physiological phenomenon affects all cats, whether they live indoors or outdoors, and whether they are short-haired or long-haired, although its intensity and duration vary greatly from one individual to another. Contrary to popular belief, shedding itself is not a sign of poor health: it is a perfectly normal mechanism, comparable to the shedding of leaves on certain trees, which allows the cat to adapt the thickness of its coat to future light and temperature conditions.
When and why does shedding occur?
The central role of light, more so than temperature
Contrary to what many owners believe, it is not heat or cold that triggers shedding, but the duration of exposure to daylight. This photoperiodism regulates the cat's biological clock and triggers hair growth or shedding. The two most marked shedding periods therefore naturally correspond to the change of seasons: in the spring, the cat loses its thick winter coat for a lighter one, and in the autumn, it renews its coat in preparation for the coming winter, with denser regrowth and a thicker undercoat.
Indoor cats: shedding spread throughout the year
Cats that live exclusively indoors, under relatively constant artificial lighting throughout the year, do not always perceive the natural variations in daylight as clearly. Their biological clock can therefore become slightly disrupted, which often results in more continuous and diffuse hair loss throughout the year, rather than two clearly identifiable seasonal peaks like a cat with access to the outdoors. This explains why many indoor cat owners feel their cat "loses its hair all year round" without any very distinct periods of respite.
Factors influencing the intensity of shedding
Beyond light, several elements can accentuate or modify a cat's shedding. Central heating, which dries out the ambient air in winter, can encourage more significant hair loss than in a more humid environment. Breed also plays an important role: cats with dense coats and abundant undercoats, such as the Maine Coon, the Norwegian Forest Cat, or the Persian, generally have more visible and voluminous shedding than breeds with short, fine hair. Age also plays a role, as a kitten has not yet developed its final adult coat, while a senior cat may see the quality and density of its fur change. Finally, stress, lower-quality nutrition, or an underlying health condition can also accentuate hair loss, sometimes outside of the usual shedding periods.
Hairballs: the main risk associated with shedding
During shedding, the cat swallows a much larger amount of hair than usual while grooming, its rough tongue acting like a brush that captures dead hair with every stroke. Some of this hair is naturally eliminated in the stool, but when the amount ingested exceeds the digestive system's ability to clear it, it can accumulate in the stomach and form what is known as a trichobezoar, more commonly called a hairball.
Recognizing the warning signs
Occasional regurgitation of small, elongated hairballs, usually followed by the cat returning to normal activity, is generally not worrying and is part of the natural elimination behavior. On the other hand, frequent or repeated vomiting, a persistent dry cough without the expulsion of a hairball, constipation, a swollen belly, loss of appetite, or unusual lethargy may indicate excessive accumulation, or even a partial or complete digestive obstruction, which constitutes a veterinary emergency.
Preventing the formation of hairballs
Regular brushing remains the most effective way to limit the amount of dead hair the cat ingests while grooming itself: the less dead hair on the coat, the less the cat swallows. A high-quality diet, rich in fiber and sometimes enriched with omega-3 and omega-6, also promotes efficient digestive transit and better coat quality. Some malt-based supplements, available at veterinary pharmacies, also help facilitate the natural elimination of ingested hair; they can be offered as a targeted treatment during the most intense shedding periods, based on a veterinarian's advice.
How to properly brush your cat during shedding
Frequency adapted to the type of hair
For a short-haired cat, brushing once or twice a week is usually sufficient during normal periods, but it is useful to switch to brushing every two or three days during peak shedding in the spring and autumn. For a long-haired or semi-long-haired cat, such as a Maine Coon or a Persian, daily or every-other-day brushing is recommended during shedding to avoid both excessive ingestion of hair and the formation of knots that can become painful and difficult to detangle if not treated quickly.
The right tools for the coat
A detangling brush with rounded teeth allows for the gentle removal of dead undercoat and emerging knots without pulling on the skin, which is particularly appreciated by sensitive cats or those not used to being brushed. For cats with very dense fur, an undercoat rake usefully complements the brush by reaching the deeper layers of the coat. After the brushing session, a practical accessory like a vacuum brush then allows you to quickly remove the hair left on sofas, carpets, or clothing, a welcome gesture during the weeks when the house seems to be covered in hair continuously.
Getting a reluctant cat used to brushing
Not all cats spontaneously enjoy being brushed, especially if they haven't been accustomed to it from a young age. It is better to start with very short sessions lasting a few tens of seconds, choosing a time when the cat is already relaxed, and stopping before it shows signs of annoyance (flicking tail, flattened ears). Systematically associating brushing with a treat or a pleasant moment helps create a positive association. With patience and consistency, most cats eventually tolerate, or even enjoy, this moment, especially on areas they like, such as the back and the base of the neck.
Nutrition and useful supplements for coat quality
A balanced and high-quality diet, providing quality proteins, essential fatty acids, and sufficient hydration, plays a significant role in coat health. A well-nourished cat generally has more resistant, less brittle hair and overall better-regulated shedding. In case of doubt about the most suitable diet for your cat, especially during periods of heavy shedding, a veterinarian's opinion allows for adjustments to intake if necessary, particularly in elderly cats or those with dull or thinning fur outside of the usual shedding periods.
When to consult a veterinarian
Normal shedding results in relatively even hair loss across the entire body, without bald patches, redness, or excessive itching. Conversely, localized hair loss in patches, associated with scratching, redness, scabs, or skin that appears irritated, is not normal shedding and may indicate an allergy (notably to fleas, even with a single bite), a skin infection, a parasitic problem, or a hormonal cause. Similarly, repeated vomiting of hairballs, prolonged loss of appetite, or lethargy during the shedding period always justify a consultation, as does a coat that becomes dull, dry, or thinning in a lasting way outside of the usual seasonal peaks.
Living peacefully with your cat's shedding
Shedding is part of every cat owner's daily life, and there is no way to eliminate it completely: it is a natural mechanism necessary for coat health. However, regular and adapted brushing, a quality diet, and good observation of the cat's behavior make it possible to transform this sometimes dreaded period into an additional moment of bonding, while effectively limiting the risks of hairballs and the invasion of hair throughout the house.
Frequently Asked Questions
My indoor cat sheds all year round: is this normal?
Yes, it is common in cats living exclusively indoors, whose biological clock perceives natural variations in daylight less clearly. Hair loss is then often more diffuse and continuous rather than concentrated in two well-marked periods.
How often should I brush my cat during shedding?
For a short-haired cat, every two to three days is sufficient during the shedding period. For a long-haired or semi-long-haired cat, daily or every-other-day brushing is recommended to limit hair ingestion and prevent the formation of knots.
How do I know if a hairball requires a visit to the vet?
Occasional regurgitation followed by normal behavior is generally not worrying. Repeated vomiting, constipation, a swollen belly, loss of appetite, or lethargy should, however, lead to a prompt consultation, as they may signal excessive accumulation.
Are malt-based supplements really useful?
They can facilitate transit and the natural elimination of ingested hair, in addition to brushing, especially during peak shedding. However, they do not replace regular brushing or a quality diet, and their regular use is best discussed with a veterinarian.
Is heavier-than-usual shedding always a sign of a problem?
Not necessarily: the intensity of shedding varies according to age, breed, environment, and even from one year to the next for the same cat. On the other hand, localized hair loss, accompanied by scratching or redness, goes beyond the scope of normal shedding and justifies veterinary advice.
To properly equip your cat during shedding, discover our selection of brushes and grooming accessories in the Cat Brushes collection.