Chartreux: how much hair it actually swallows, and how to ease the transit
The Chartreux does not groom differently from any other cat. What differs is how much there is to groom: a dense topcoat over a woolly undercoat that, twice a year, releases in bulk. Not all of that wool ends up on the floor — most of it goes via the tongue, then the stomach. The Chartreux breed profile covers its build and coat type.
An hour a day, and it is not negotiable
The study by R. A. Eckstein and Benjamin Hart, published in 2000 in Applied Animal Behaviour Science, puts oral grooming at 4% of the 24-hour time budget, or 8% of the time a cat is neither asleep nor resting (study on Google Scholar). More importantly, the authors show the behaviour is centrally controlled: after three days prevented by an Elizabethan collar, oral grooming rebounded by 67% within the following twelve hours. You cannot reduce a cat's need to lick itself — you can only reduce the amount of hair available.
The number that puts it in perspective
A short-haired cat sheds around 28 grams of hair per kilo of bodyweight per year, of which roughly two thirds are swallowed and recovered in the faeces — a figure reported by M. Weber, Vincent Biourge and colleagues in a study published in 2015 in Veterinary Medicine and Science (study on Google Scholar). On a 5 to 6 kilo Chartreux, that is in the order of 140 to 170 grams of hair shed a year, about a hundred of them swallowed. The same study measured brushing objectively: around 63 milligrams of hair removed per brush stroke outside the moult, and up to double that during the moult in semi-long-haired cats. A ten-minute brushing session is therefore not symbolic: it removes grams that will not end up in the stomach.
What fibre changes, and what brushing does not prove
Let us be honest about the level of evidence. No controlled trial has shown that brushing reduces hairball incidence: that is a logical inference, not data. The effect of dietary fibre, by contrast, has been measured: in the Weber study, raising total fibre to 11% and then 15% increased faecal hair excretion by 81% and 113% in long-haired cats, with no significant effect in short-haired ones. In other words, in a cat with a heavy coat load, a higher-fibre ration genuinely moves hair downwards rather than upwards. On so-called hairball diets generally, the review by Martha Cannon, published in 2013 in the Journal of Feline Medicine and Surgery, concludes there is no objective evidence of efficacy (study on Google Scholar).
When a hairball stops being trivial
That is the most important point in the same review: in a short-haired cat, frequent hairballs should be treated as a symptom of chronic disease — a pruritic skin condition, fleas, food intolerance, a gastrointestinal motility disorder — rather than as normal. Cannon also stresses that no reliable incidence data has ever been published: the percentages that circulate come from owner questionnaires. Repeated episodes, unproductive retching, a drop in appetite or weight loss warrant a consultation, not a tube of laxative paste.
Matching the rhythm of the moult
The hair cycle follows day length: Wouter Hendriks and colleagues measured in 1997, in Comparative Biochemistry and Physiology, a growth rate ranging from 62 micrograms per square centimetre per day in winter to 289 in summer across 39 adult cats (study on Google Scholar). A factor of nearly five. Indoors, artificial light and heating smooth the moult without abolishing it: a short brushing twice a week all year round, stepped up in spring and autumn, works better than intensive sessions twice a year. Our guide to stress-free brushing covers the tools, and cat hairballs the digestive side. For the weight management specific to this stocky cat, see feeding a Chartreux, and the equipment in cat care and grooming.
Frequently asked questions
Should a Chartreux be bathed during the moult?
No. A wet woolly undercoat dries very slowly and macerates; comb and brush are enough, optionally finished with a damp glove.
Does an indoor Chartreux shed all year?
It sheds in a more spread-out way, without losing the response to day length. Two peaks usually remain noticeable.
Should I give laxative paste preventively?
Nothing supports routine preventive use. Regular brushing and a properly fibred ration are far better documented.
This guide is part of Planète Pets’s Cats universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.