FrenchBulldogs.co.uk
More comments in the breed's biggest online community are about snoring and sleep than about breathing itself. Most are fond: the snoring potato, the dog that sleeps sixteen hours. The questions inside them are the airway questions asked sideways, by people who have not met the word BOAS yet. This page starts from the snore.
What a snore is
A snore is the sound of an airway partly closing. In the first study to record flat-faced dogs asleep at home, on a neckband that counts breathing obstructions, the flat-faced dogs snored for a far larger share of the night than long-nosed dogs, and across all the dogs the proportion of the night spent snoring rose in step with the number of times the airway partly or fully closed. The 2026 review of that work puts the mechanism plainly: "repeated episodes of partial or complete blockages of airflow occur during sleep. This leads to intermittent hypoxemia." Hypoxaemia is the blood's oxygen dropping. So the snore is not a noise the dog makes; it is the oxygen falling, audibly, many times a night, and the review's reason for caring is that broken sleep is harmful in its own right.
"Some noise" is a grade
The Respiratory Function Grading Scheme run by the Royal Kennel Club with Cambridge is the honest scale, and its own wording is the one to use. Grade 0: "clinically unaffected and is currently free of respiratory signs of BOAS." Grade 1: "clinically unaffected but does have some respiratory noise." Grade 2: "clinically affected and has moderate respiratory signs of BOAS that should be monitored." Grade 3: "clinically affected and has severe respiratory signs of BOAS and should be seen by your own vet." The assessor listens with a stethoscope before and after three minutes of brisk exercise, for noise and for the effort of breathing in. So a dog with some noise and no effort is a Grade 1 dog, and the scheme calls it unaffected. Noise at rest, effort to breathe in, and noise that gets worse after three minutes is a Grade 2 or 3 dog. The grading chart is the version to print and fill in over a week.
What to watch at home, at night
The vet's ten minutes in a strange room is the worst time to assess a sleeping problem, which is why the home record matters. The site's chart already carries the sleep column, from the scheme's descriptions: a Grade 1 dog sleeps flat and does not reposition to breathe; a Grade 2 dog "props head up or sleeps in unusual positions"; a Grade 3 dog "cannot sleep flat; may wake to reposition and breathe." Owners describe the same things in their own words: sleeping sitting up, chin propped on the sofa arm, a toy held in the mouth to keep the jaw open, a snore that stops in a silence and restarts with a gasp. None of those positions has been studied as a marker; they are what owners report and what a vet asks about, and a thirty-second phone video of the dog asleep is worth more to the vet than any description of it.
And by day
The daytime signs belong on the same sheet. The 2017 Cambridge risk-factor study lists the picture as "snoring and laboured breathing with exercise and heat intolerance, often accompanied by sleep disturbances, gastrointestinal issues including regurgitation and vomiting, and in severe cases, cyanosis and collapse." Regurgitation is the one owners file under "eats too fast". In a study of eleven French Bulldogs with a sliding hiatal hernia, all eleven regurgitated, and acid reflux measured by a capsule in the oesophagus was higher by day than by night, so bringing food back up is not a night sign to be watched for; it is a day sign that belongs on the hernia page and on the vet's list.
Weight is the lever
The 2024 study of 63 pet dogs recorded at home found what raises the number of obstructions an hour. Being flat-faced multiplied it by about five and a half. A body condition score over five out of nine multiplied it by three and a half. A moderate or severe BOAS grade, among the flat-faced dogs, by two and a half. Age did not. Of those, the owner holds one. The 2015 study of 700 dogs found the same thing from the other direction: a thicker neck raised the risk of BOAS on its own, "a risk factor for human sleep apnoea and not previously realised in dogs", and obesity raised it further. The body condition checker gives a score and a portion in a minute, and the score is the number that moves the snore.
The room
A warm bedroom is a warm room with a dog in it that cannot cool itself, and the UK heat-illness data found older dogs and dogs with breathing trouble were the ones most prone to the kind of overheating that happens indoors rather than on a walk. A fan, a gel mat, a north-facing room in July, and the door open. The summer kit has the evidence for each.
What surgery does
Less than the word "fixed" suggests and more than nothing. In eleven French Bulldogs after palate and nostril surgery, breathing rate fell significantly and "Most of the questionnaire scores were improved after surgery"; the follow-up was short and the study did not measure sleep directly. The 2026 review calls sleep-disordered breathing "at least partly treatable with surgical and conservative methods", and conservative means weight. The decision is the grade's, not the snore's: a Grade 1 dog is not operated on for a noise, and a Grade 3 dog is not left because it seems happy. The soft palate and nostril pages have the operations and the BOAS page has the costs.
How much sleep is normal
The review's figure for adult dogs is a total of 8.4 to 13.5 hours a day: six or seven at night and about three in the afternoon, and the afternoon sleep is normal, not a symptom. A French Bulldog that sleeps twenty hours is sleeping more than that, and the questions are the ones above: is it hot, is it heavy, is the night's sleep broken so the day is spent catching up, and has anyone graded it.
Tonight
- Film the dog asleep for thirty seconds, snore and position, and keep it for the vet.
- Cool the room and get the dog off the bed if the bed is the warm spot.
- Score the body condition, and if it is over five, start the portion the checker gives.
- Print the grading chart and fill in a week.
- Book the grading, or a vet visit with the video, and take the chart.
What we did not read
The 2012 survey in which owners of flat-faced dogs called breathing signs normal for the breed is not indexed where we could reach it, so its percentage is not quoted. No study has tested sleeping position as a marker; the positions above are the site's own chart and owners' descriptions. UK clinical definitions of stertor, stridor and reverse sneezing were not reached, so the page does not define them; the vet will tell them apart in a minute.
Common questions
Is it normal for a French Bulldog to snore?
It is common, and the grading scheme has a place for it: a dog with some respiratory noise and no effort to breathe is Grade 1, which the scheme calls clinically unaffected. What makes it more than that is effort breathing in, noise at rest that worsens after three minutes of exercise, and a night spent propping the head up or waking to reposition. The snore itself is the airway partly closing, and the proportion of the night spent snoring rises with the number of obstructions.
Why does my French Bulldog sleep sitting up?
Because lying flat closes the airway further. The site's grading chart, following the scheme's descriptions, puts propping the head up or sleeping in unusual positions at Grade 2 and being unable to sleep flat at Grade 3. No study has tested the position as a marker, but it is what a vet asks about, and a thirty-second video of it is the most useful thing you can bring to the appointment.
Will losing weight stop my French Bulldog snoring?
It is the one lever the owner holds. In dogs recorded asleep at home, a body condition score over five out of nine multiplied the rate of breathing obstructions by three and a half, and a thicker neck was a BOAS risk in its own right in a study of 700 dogs. Being flat-faced multiplies obstructions by more, and surgery is the other lever, but weight is the one that costs nothing and starts tonight.
How many hours a day should a French Bulldog sleep?
The published range for adult dogs is 8.4 to 13.5 hours in total, six or seven at night and about three in the afternoon. Afternoon sleep is normal. Twenty hours is more than that, and the questions are whether the night is broken, the room is warm, the dog is heavy, and whether anyone has graded its breathing.
Does BOAS surgery stop snoring?
It reduces it in most dogs and does not abolish it. In eleven French Bulldogs after palate and nostril surgery, breathing rate fell and most owner questionnaire scores improved, over a short follow-up that did not measure sleep directly. The review of sleep-disordered breathing calls it at least partly treatable, surgically and by weight. The grade decides whether to operate, not the snore.
My French Bulldog gags and brings food up. Is that the airway?
Often, and it is a day sign, not a night one. In eleven French Bulldogs with a sliding hiatal hernia all regurgitated, and measured reflux was higher by day than at night. Regurgitation belongs on the same sheet as the snore and on the vet's list; the hiatal hernia page explains the link between the airway and the stomach.
Related reading
General care guidance, not veterinary advice. If your dog is unwell, contact your vet.