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French Bulldog

French Bulldog
Photo: Ildar Sagdejev (Specious) / CC BY-SA 4.0 · Wikimedia

41 French Bulldogs in the atlas. Every number on this page has a source.

Population-genetic snapshot of French Bulldogs in the Sniff Atlas, source-graded Mendelian carrier frequencies from Donner 2023, and nutrition guidance tied to the genetic findings above.

Also known as Bouledogue Francais, French bull dog, and Frenchie.

See in the atlas → From CanVAS
The plain version

French Bulldogs have a moderately diverse genetic background, which means they have a fair mix of traits within the breed. They typically weigh around 24 pounds and usually live about 10 years. This breed is known for its compact size and distinctive look, with a friendly and sturdy build. Some health issues related to their genetics, like certain spine and muscle conditions, have been found in the breed’s overall gene pool, so it’s a good idea to talk with your vet or consider genetic testing to keep your dog healthy.

What the atlas says about French Bulldog

In the atlas, the French Bulldog clusters consistently as French Bulldog (100% of the 41 dogs here). At the trait loci, FGF4_retrogene_CFA12 runs lower than average (21% here vs 80%); IGF1 runs higher than the atlas average (94% here vs 55%). Dogs here sit in a relatively sparse region of the atlas, fewer close neighbors than typical.

Median lifespan is 10.0 years, about 2.5 years shorter than a typical dog of 11.0 kg, one of the larger gaps in the atlas.

Genetic dimensions · CanVAS atlas

What the genome says about French Bulldog

Computed from the 18,477 research dogs in the Atlas.

Dogs in the Atlas
41Founders
27 from Hayward2016, 10 from Spatola, 4 from JenkinsWGS
Genetic diversity
0.32Moderate
Mean heterozygosity across the breed. Ranks 64th most genetically tight of 107 ranked breeds.
What does genetic diversity mean?

How varied a breed's gene pool is — the share of gene spots where a typical dog of the breed carries two different versions rather than two identical ones.

How to read it: Higher = more diverse. Among well-sampled breeds it ranges roughly 0.22 (least diverse) to 0.33 (most diverse).

Diversity is a strength, not a verdict on any individual dog. Lower diversity means it's worth paying attention to recessive-risk testing — not that a dog is doomed.

Cluster structure
Splits into two genetic sub-populations
Intra-breed RMS distance: 22.66 · likely working/show-line, regional, or kennel lineage split.
What does within-breed variation mean?

How much individual dogs within the breed differ from each other genetically.

How to read it: Higher = more internal variety among individuals of the breed.

Sensitive to how many dogs of the breed we've sampled.

Related breeds
Built from
Distant kin · one shared founding ancestor
In the Non-Sporting group
Explore the full lineage map →
VBO foundation stock (breeding records) · AKC breed group
Relatedness is documented lineage + kennel family. Genetic-ancestry distance measures diversity, not kinship, so it isn't used here.
How long they live
9.8years (life expectancy)
95% CI 9.4–10.1 · VetCompass, McMillan 2024, n=11,821. source
What does typical lifespan mean?

The median age dogs of the breed tend to reach.

How to read it: Higher = longer-lived. Compare to longevity-for-size to see whether it's just a size effect.

Drawn from population lifespan records; individual dogs vary widely with care, genetics, and luck.

Trait genetics
Allele frequencies at named morphology loci

Frequency of the alternate allele in this breed at each locus's representative SNP.

Body size
IGF194%
HMGA232%
SMAD250%
LCORL100%
STC288%
ADAMTS1780%
Leg length
FGF4·CFA18100%
FGF4·CFA1221%
Coat
RSPO254%
FGF537%
KRT71100%
MC1R94%
Ear set
MSRB3100%
Skull shape
BMP389%
SMOC273%
n = 41 dogs · moderate confidence · CanVAS (Brundage 2026) · Sniff Atlas
Names & origins

Other names

The French Bulldog is also recorded as Bouledogue Francais, French bull dog, and Frenchie.

Identified as French Bulldog (VBO:0201455) in the Vertebrate Breed Ontology (Mullen et al. 2025, CC-BY 4.0) · registry IDs FCI 101 · iDog 106 · VeNom 13768.

Temperament

What French Bulldogs tend toward

Tendencies from owner surveys of purebred French Bulldogs — a leaning across the breed, not a prediction for any one dog. A bar’s strength shows how much of that behavior breed actually explains: for most it’s faint, because the rest is your dog, their training, and the life you give them.

Biddabilitybreed ~18%
biddableindependent
n = 25 dogs · Morrill et al. 2022, Science, Darwin's Ark (CC0)
Owner-reported purebreds; each factor n ≥ 25. "Breed ~%" is the share of this behavior explained by breed.
What you see when you look at a French Bulldog

What does the genome say about how a French Bulldog looks?

French Bulldogs look the way they do because of a small set of fixed and near-fixed morphology genes that, taken together, define the visible breed. Each translation below pairs the gene with the trait an owner actually sees, the breed's allele frequency at that locus, and a one-clause causal phrase.

Where the breed-defining genes act, mapped on a generic dog-body key — and how fixed each marker is in the French Bulldog. The figure is the most-settled marker we read in that region; the full per-locus panel is below. (The silhouette is a shared anatomical guide, not this breed's outline.)

Body sizeLCORL · 100%Skull shapeBMP3 · 89%EarsMSRB3 · 100%Leg lengthFGF4 CFA18 · 100%Coat & colorKRT71 · 100%
CanVAS trait-locus panel (Brundage 2026)
15 morphology markers read across 5 regions. Allele frequency = how fixed a marker is in this breed, not whether your dog carries it.

Size and build

IGF1 is near-fixed at 94% for the small-body allele, which keeps the breed compact relative to its working-line ancestors.

IGF1what this gene does

IGF1 is a gene that plays a key role in determining a dog's body size. It influences how much a dog grows, affecting overall stature.

For your dog: Knowing about IGF1 gives you insight into your dog's size traits, but it’s just one part of the bigger picture when it comes to their health and care.

Full IGF1 gene page →

HMGA2 sits at 32%. HMGA2 is a chromosome-10 size locus that acts together with IGF1, and intermediate frequencies reflect partial commitment to the dominant size variant.

HMGA2what this gene does

HMGA2 is a gene that influences body size in dogs, helping determine how big or small a dog grows.

For your dog: Knowing about HMGA2 helps you appreciate the genetic factors behind your dog's size, but it doesn't signal any health issues.

Full HMGA2 gene page →

SMAD2 sits at 50% at the chromosome-7 height locus.

SMAD2what this gene does

SMAD2 is a gene involved in regulating body size by influencing how cells grow and develop.

For your dog: Knowing about SMAD2 helps understand your dog's size traits but isn't linked to health issues; no immediate action needed.

Full SMAD2 gene page →

LCORL is near-fixed at 100%, the NCAPG/LCORL height locus that is one of the strongest single contributors to canine body size.

LCORLwhat this gene does

LCORL is a gene that influences body size in dogs. It helps determine how big or small a dog might grow.

For your dog: Knowing about LCORL helps you appreciate the genetic factors behind your dog's size, but it’s just one piece of the bigger picture when it comes to health and care.

Full LCORL gene page →

STC2 is near-fixed at 88%, modulating growth-axis signaling toward the breed's body-size set point.

ADAMTS17 sits at 80%. ADAMTS17 is a body-size locus also linked to lens disorders.

ADAMTS17what this gene does

ADAMTS17 is a gene that influences body size and also plays a role in certain eye conditions. It affects the structure of tissues in the eye and elsewhere in the body.

For your dog: If your dog belongs to a breed known to carry ADAMTS17 variants, it’s worth discussing genetic testing and eye exams with your vet to stay ahead of potential issues.

Full ADAMTS17 gene page →

Leg length

The FGF4 retrogene on chromosome 18 is near-fixed in this breed at 100%. This is the leg-length variant. The breed is fully committed to the long-legged form rather than the short-legged Corgi-and-Dachshund body plan.

The FGF4 retrogene on chromosome 12 is at 21%, leaving most of this breed clear of the chondrodystrophic intervertebral disc disease risk.

Coat type, length, and color

RSPO2 sits at 54% for the furnishings variant. Furnishings (the eyebrow-and-mustache pattern seen in Schnauzers and Wheaten Terriers) vary across the population at this intermediate frequency, and visible expression depends on the specific allele combination each dog carries.

RSPO2what this gene does

RSPO2 influences the texture and appearance of a dog's coat, particularly the presence of 'furnishings' like mustaches and eyebrows. It helps determine whether a dog has that distinctive wiry or textured look.

For your dog: If your dog has those wiry eyebrows or a mustache, RSPO2 is part of the reason—no health worries, just a coat feature worth knowing about.

Full RSPO2 gene page →

FGF5 sits at 37% for the long-coat variant. Coat length is influenced by other loci as well, so intermediate FGF5 frequencies do not always correspond to intermediate visible coat lengths.

FGF5what this gene does

FGF5 is a gene that influences the length of a dog's coat. It acts like a natural switch, telling hair follicles when to stop growing longer fur.

For your dog: If your dog has a notably long or short coat, FGF5 is likely part of the reason—no action needed, but it’s a neat genetic detail to know.

Full FGF5 gene page →

KRT71 is near-fixed at 100% for the wavy/curly variant. Coat curl phenotype varies across breeds at this fixation depending on modifier loci, and visible expression is not always curled even when the locus is fixed.

KRT71what this gene does

KRT71 is a gene that influences the curliness of a dog's coat. It helps determine whether a dog's fur is straight or has a distinctive curl.

For your dog: If your dog has a curly coat, KRT71 is likely part of the reason; it’s a natural variation, not a health concern.

Full KRT71 gene page →

MC1R is at 94% at the representative SNP. MC1R controls the switch between red-to-gold and black-to-brown pigment, with the e/e homozygous genotype producing the gold-to-red spectrum by blocking eumelanin (black and brown pigment).

MC1Rwhat this gene does

MC1R is a gene that influences coat color in dogs, affecting how pigments are produced in the fur.

For your dog: Knowing about MC1R gives insight into your dog's coat color but doesn't relate to health issues.

Full MC1R gene page →

Ears

MSRB3 is at 100% for the drop-ear allele, the genetic basis of the breed's signature dropped ear set.

MSRB3what this gene does

MSRB3 is a gene involved in the development of ear shape and structure in dogs.

For your dog: Understanding MSRB3 helps explain why your dog's ears look the way they do, but it isn't linked to any health issues.

Full MSRB3 gene page →

Skull shape

BMP3 is at 89%, contributing to the breed's brachycephalic skull shape.

BMP3what this gene does

BMP3 is a gene that influences the shape of a dog's skull, particularly contributing to a shorter, broader head shape known as brachycephaly.

For your dog: If your dog has a broad, short skull, it's worth discussing with your vet how this might impact their health, even though BMP3 isn't directly tied to illness.

Full BMP3 gene page →

SMOC2 sits at 73%, contributing to the breed's moderate head shape.

SMOC2what this gene does

SMOC2 influences the shape of a dog's skull, particularly affecting how flat or short the face appears.

For your dog: If your dog has a short nose, it's worth discussing with your vet how this trait might impact their health over time.

Full SMOC2 gene page →
Mendelian-disease genetics

What genetic diseases do French Bulldogs carry?

From a panel of 250 Mendelian-disease variants screened in 1,054,293 dogs (Donner et al. 2023), French Bulldogs carry 14 of them at observable frequency. Carrier frequency is not clinical risk. Most recessive variants require two copies for disease expression; many dominant variants show incomplete penetrance. Read this as a population fingerprint of what's in the gene pool, not a per-dog prediction.

Chondrodystrophy and Intervertebral Disc Disease Risk (CDDY)
Autosomal dominant
high 87.9%
n = 13,062 dogs · 1 variant tested · OMIA:000157-9615 · omia.org →
FGF4what this gene does

FGF4 influences leg length by affecting bone growth, leading to shorter legs in certain breeds.

For your dog: If your dog is from a breed known to carry this gene, it's worth discussing spinal health with your vet, but being a carrier doesn’t guarantee problems.

Cystinuria Type I-A (SLC3A1 p.I192V)
Autosomal recessive
high 23.6%
n = 13,114 dogs · 3 variants tested · OMIA:000256-9615 · omia.org →
SLC3A1what this gene does

SLC3A1 is a gene that helps transport certain amino acids in the kidneys. It plays a key role in preventing the buildup of cystine, which can form stones.

For your dog: If your dog is from a breed known to carry SLC3A1 variants, it’s worth discussing cystinuria risks with your vet, especially if urinary issues arise.

Degenerative Myelopathy (DM)
Autosomal recessive (Incomplete penetrance)
moderate 19.6%
n = 13,111 dogs · 1 variant tested · OMIA:000263-9615 · omia.org →
SOD1what this gene does

SOD1 is a gene that helps protect cells from damage caused by harmful molecules called free radicals.

For your dog: If your dog is a carrier of SOD1 variants, it's worth discussing with your vet, but remember carrier status doesn't mean your dog will get the disease.

Dilated Cardiomyopathy risk factor (Discovered in the Doberman Pinscher; PDK4-related)
Autosomal dominant (Incomplete penetrance)
moderate 3.4%
n = 13,114 dogs · 2 variants tested · OMIA:000162-9615 · omia.org →
PDK4what this gene does

PDK4 helps regulate how cells use energy, especially in the heart muscle.

For your dog: If your dog is one of the breeds known to carry this gene, it’s worth discussing heart health with your vet, but being a carrier doesn’t mean your dog will develop disease.

Cone-Rod Dystrophy (cord1-PRA/crd4)
Autosomal recessive (Incomplete penetrance)
low 8.0%
n = 13,097 dogs · 1 variant tested · OMIA:001432-9615 · omia.org →
RPGRIP1what this gene does

RPGRIP1 is a gene involved in the function of photoreceptor cells in the eye, which help dogs see in different light conditions.

For your dog: If your dog belongs to a breed known to carry RPGRIP1 mutations, it’s worth discussing with your vet to understand the risks and monitor eye health.

Canine Multifocal Retinopathy 1 (Discovered in Mastiff-related breeds; CMR1)
Autosomal recessive
low 5.4%
n = 13,114 dogs · 1 variant tested · OMIA:001444-9615 · omia.org →
BEST1what this gene does

BEST1 is a gene that helps maintain the health of the retina, the light-sensitive layer at the back of the eye. It plays a role in keeping the cells in the retina functioning properly.

For your dog: If your dog is from a breed known to carry BEST1 variants, it’s worth discussing retinal health with your vet, especially if you notice any vision changes.

Cystinuria Type I-B (SLC7A9 p.A217T)
Autosomal recessive (Incomplete penetrance)
low 0.65%
n = 13,114 dogs · 2 variants tested · OMIA:001880-9615 · omia.org →
SLC7A9what this gene does

SLC7A9 is a gene that helps transport certain amino acids in the kidneys. It plays a role in how the body handles cystine, an amino acid that can form crystals.

For your dog: If your dog is a carrier, it’s worth discussing with your vet to monitor urinary health and catch any issues early.

Hyperuricosuria (HUU)
Autosomal recessive
low 0.20%
n = 13,114 dogs · 1 variant tested · OMIA:001033-9615 · omia.org →
SLC2A9what this gene does

SLC2A9 is a gene that helps regulate uric acid levels in a dog's body. It plays a role in how the kidneys handle this substance.

For your dog: If your dog is one of the breeds known to carry this gene variant, it’s worth discussing with your vet to understand any potential urinary health concerns.

Hypocatalasia
Autosomal recessive
low <0.1%
n = 13,113 dogs · 1 variant tested · OMIA:001138-9615 · omia.org →
CATwhat this gene does

CAT is a gene that helps produce an enzyme called catalase, which breaks down hydrogen peroxide in the body to prevent cell damage.

For your dog: If your dog is from a breed that can carry this gene, it’s worth asking your vet about testing—being a carrier doesn’t mean your dog is affected, but it can inform health decisions.

Von Willebrand's Disease, Type 1 (vWD 1)
Autosomal recessive
low <0.1%
n = 13,114 dogs · 1 variant tested · OMIA:001057-9615 · omia.org →
Shar-Pei Autoinflammatory Disease (SPAID)
Autosomal dominant (Incomplete penetrance)
low <0.1%
n = 13,114 dogs · 1 variant tested · OMIA:001561-9615 · omia.org →
MTBPwhat this gene does

MTBP is a gene involved in regulating inflammation in the body. It helps control how the immune system responds to triggers.

For your dog: If your dog is from a breed known to carry MTBP variants, it's worth discussing with your vet whether genetic testing or monitoring for inflammation-related issues makes sense.

Early-Onset Progressive Polyneuropathy (Discovered in the Greyhound)
Autosomal recessive
low <0.1%
n = 13,114 dogs · 2 variants tested · OMIA:002120-9615 · omia.org →
NDRG1what this gene does

NDRG1 is a gene involved in nerve cell function and maintenance, helping keep the nervous system working properly.

For your dog: If your dog is from a breed known to carry NDRG1 variants, it’s worth discussing with your vet, especially if you notice any mobility issues.

Craniomandibular Osteopathy (Discovered in the Cairn, Scottish and West Highland White Terrier)
Autosomal dominant (Incomplete penetrance)
low <0.1%
n = 13,114 dogs · 1 variant tested · OMIA:002244-9615 · omia.org →
SLC37A2what this gene does

SLC37A2 is a gene involved in how cells manage certain sugar molecules, which can affect bone development.

For your dog: If your dog is from a breed known to carry this gene variant, it's worth discussing with your vet, especially if you notice jaw discomfort or eating issues.

Neonatal Cerebellar Cortical Degeneration (SPTBN2-related; NCCD)
Autosomal recessive
low <0.1%
n = 13,114 dogs · 1 variant tested · OMIA:002092-9615 · omia.org →
Source: Donner J et al. 2023. Genetic prevalence and clinical relevance of canine Mendelian disease variants in over one million dogs. PLOS Genetics 19(2):e1010651 · Evidence: Limited (DTC ascertainment, tag-SNP proxy) · Confounding MEDIUM · License CC-BY-4.0 · Phene IDs from OMIA (Sydney School of Veterinary Science, The University of Sydney; DOI 10.25910/2AMR-PV70).
Sample size in this breed: 13,114 dogs from the Donner 2023 cohort.

Which Mendelian variants matter most for French Bulldogs?

The Mendelian-disease table above lists variants screened in 13,114 French Bulldogs (Donner 2023). Four variants stand out by carrier frequency and impact. The first is almost universal in the breed.

Chondrodystrophy and Intervertebral Disc Disease Risk (CDDY)

Chondrodystrophy and Intervertebral Disc Disease Risk in French Bulldogs is caused by a FGF4 retrogene insertion. The variant appears at 87.9% carrier frequency in the Donner cohort (n=13,062). Nearly nine in ten French Bulldogs carry at least one copy. Let that settle for a moment.

French Bulldogs do not show the shortened limbs of Dachshunds despite carrying the same CDDY variant at near-fixation. The breed standard shows normal leg proportions. The consistent expression in French Bulldogs is intervertebral disc disease risk, not the classical chondrodystrophic phenotype. The high carrier frequency means IVDD prevention, weight management, controlled jumping and stair climbing in puppyhood, spinal monitoring, is not optional for the breed. It is baseline care.

Testing is available. The UC Davis VGL and most commercial panels cover FGF4. Breeding stock testing informs pairing decisions but does not change the breed’s near-universal carrier status.

Cystinuria Type I-A (SLC3A1 p.I192V)

Cystinuria Type I-A in French Bulldogs is an autosomal-recessive condition caused by a variant in SLC3A1. The disease causes excess urinary cystine excretion and predisposes to bladder stones, which can require surgical removal. 23.6% of French Bulldogs in the Donner cohort carry one copy (n=13,114). The second-highest carrier frequency in the breed after CDDY.

Testing is widely available. Affected dogs are managed with diet (low-protein, alkalinizing), increased water intake, and monitoring. Urine monitoring is standard preventive care for at-risk individuals.

Degenerative Myelopathy (DM)

Degenerative myelopathy in French Bulldogs is an autosomal-recessive-with-incomplete-penetrance condition affecting the spinal cord. The disease causes progressive loss of rear-leg function, typically in older dogs. Not every carrier becomes symptomatic. 19.6% of French Bulldogs in the Donner cohort carry one copy (n=13,111).

Testing is available. Dogs with two copies face a lifetime risk of disease but may never show signs. Owners with at-risk dogs should monitor for early loss of rear-limb coordination and discuss exercise and management with their vet.

How should I test my French Bulldog?

A breed-specific panel from a CLIA-accredited lab is the high-yield path. The minimum useful set for French Bulldogs is FGF4 (CDDY), SLC3A1 (cystinuria I-A), and the DM-related locus. Testing for the SLC7A9 variant (cystinuria I-B) is lower-yield given its 0.65% carrier frequency but may be worth including in a comprehensive panel.

What should I feed a French Bulldog?

Feeding a French Bulldog well means feeding around the breed’s known genetic vulnerabilities and anatomical constraints. French Bulldogs cannot pant efficiently, which means heat-of-the-day exercise is dangerous and meal timing matters more than it does for most breeds. Couple that with the 87.9% carrier frequency for the CDDY variant and the intervertebral disc disease risk it confers, plus the 23.6% carrier frequency for cystinuria I-A, and the food decision becomes a three-axis problem: thermoregulation, spinal health, and urinary health.

Meal timing and portion control are your first levers. Split the daily portion into two or three smaller meals spaced throughout the day. This reduces the post-meal gastrointestinal load that can trigger thermal stress and heat sensitivity. Feed during cooler hours, early morning and evening, never during or just before warm-weather exercise. French Bulldogs are prone to heat-related stress; a large meal in the heat of the day compounds the risk.

Joint and spinal support matters because IVDD risk is breed-endemic. The 87.9% CDDY carrier rate (Donner 2023, n=13,062) means weight management is not optional. Excess body weight loads the intervertebral discs. Use an adult maintenance formula, not a large-breed growth formula. Maintain your dog at the lower end of the healthy weight range for their frame. Controlled-calcium formulations (calcium content 1.0% to 1.8% on a dry-matter basis, aligned with NRC 2006 guidelines) are appropriate for adult French Bulldogs not in rapid growth.

Cystinuria prevention via diet is secondary to testing and urine monitoring. The 23.6% carrier frequency for SLC3A1 (Donner 2023, n=13,114) means stone risk is material in the breed. If your dog is affected or at risk, a veterinary-directed low-protein diet (12% to 15% crude protein) combined with increased water intake and urine alkalinization is standard management. For carriers and unaffected dogs, a standard adult formulation with adequate hydration is sufficient. Encourage water intake by offering fresh water throughout the day and adding water to kibble if your dog is reluctant to drink.

Grain-free diets are not contraindicated by the breed genetics shown here. The FDA grain-free DCM signal was identified primarily in Golden Retrievers and related breeds (Adin et al. 2019, JVIM). French Bulldogs carry a separate DCM risk factor: the TTN variant at 3.4% carrier frequency (Donner 2023, n=13,114). That variant is unrelated to grain content. Grain-free diets are not contraindicated by French Bulldog genetics, but the TTN locus is worth including in a comprehensive health panel. The breed’s anatomical constraints (heat sensitivity, airway narrowing) matter more than the presence or absence of grains.

What we don’t know

The interplay between CDDY carrier status and symptomatic IVDD onset in French Bulldogs is incompletely understood. Nearly nine in ten French Bulldogs carry the variant, yet not all develop disc disease. We do not yet know which combination of carrier status, weight, exercise pattern, age, and individual spinal anatomy tips a dog from carrier to symptomatic.

The penetrance of DM in French Bulldog carriers is unknown. The inherited locus is clear; the proportion of dogs with two copies who become phenotypically affected remains unquantified.

Brachycephalic airway syndrome is the breed’s defining anatomical problem. The genetic architecture driving the severity gradient within the breed, why some French Bulldogs have minor snoring and others have severe airway obstruction, is not yet mapped. The breeding standard itself selects for the anatomy that produces the problem.

Frequently asked questions about French Bulldogs

What is the most common genetic disease in French Bulldogs? Chondrodystrophy and Intervertebral Disc Disease Risk (CDDY). 87.9% of French Bulldogs carry the variant (Donner 2023, n=13,062). The breed shows normal limb proportions but carries high intervertebral disc disease risk throughout life.

Are French Bulldogs prone to back problems? Yes. The 87.9% carrier frequency for CDDY (Donner 2023, n=13,062) makes intervertebral disc disease a breed-endemic risk. Weight management, controlled jumping, and spinal monitoring are baseline care, not optional.

How long do French Bulldogs live? The atlas-derived median lifespan for French Bulldogs is 10.0 years. Individual lifespans vary widely depending on health management and surgical history.

Should I do a DNA test on my French Bulldog? For breeding stock, yes. A panel covering FGF4 (CDDY), SLC3A1 (cystinuria I-A), and the DM-related locus will inform pairing decisions and help predict carrier status in offspring.

What should I feed a French Bulldog to prevent back problems? Weight management is the single most important lever. Maintain your dog at the lower end of the healthy weight range. Feed two to three smaller meals in cooler hours rather than one large meal. Use a standard adult formulation with controlled calcium (1.0% to 1.8% on a dry-matter basis per NRC 2006).

Are French Bulldogs good with kids? French Bulldogs are generally patient and playful with children. Rough play and jumping should be supervised to protect their spines, given the breed’s high IVDD risk.

Can French Bulldogs exercise normally? French Bulldogs have limited heat tolerance due to their brachycephalic anatomy. Short, cool-weather exercise is appropriate. High-intensity or extended exercise in warm conditions creates heat-stress risk and should be avoided.

What is the most common health problem in French Bulldogs? Brachycephalic airway syndrome is the most common anatomical problem, driven by the breed standard itself. Intervertebral disc disease is the most common genetic disease, with 87.9% carrying the CDDY risk variant (Donner 2023, n=13,062).

A gift to human medicine

French Bulldogs are a natural model for human disease

Because the same genes cause the same conditions across species, the inherited conditions documented in French Bulldogs help researchers understand, and work toward treating, the human diseases they model. This is the dog advancing human medicine. The breed models the human disease; it does not have it, and this is not a prediction for your dog.

Human equivalents via OMIA → Mondo / OMIM. Model-of, not identity.
Documented in OMIA

Every condition recorded in the French Bulldog

Beyond the testable carriers above, OMIA's literature catalogue records 24 genetic conditions in the French Bulldog, 19 of which have a known human equivalent. This is the documented landscape across all French Bulldogs ever studied, not a prediction for any one dog.

Plus 6 more conditions recorded in the French Bulldog in OMIA.

Online Mendelian Inheritance in Animals (OMIA); Nicholas, Tammen & Sydney Informatics Hub, DOI 10.25910/2AMR-PV70
Documented in the breed's literature is not carrier status and not a forecast for an individual dog. Human equivalents are mapped via Mondo/OMIM. Carrier frequencies (above) are the separately-measured testable subset (Donner 2023).
The data behind this page

Where every number on this page came from.

This page draws on three primary data sources. Carrier frequencies for the Mendelian section come from Donner et al. 2023 (CC-BY-4.0). We grade these data at evidence Limited because the cohort is a direct-to-consumer ascertainment, which biases toward owners who chose to test their dogs. The panel also uses tag-SNP proxies for some variants rather than direct causal-variant assays. Limited is a study-design grade, not a quality grade: the Donner cohort is the largest open canine-genotype dataset in existence and we are grateful for it. We rate the confounding MEDIUM.

Population-genetic dimensions (heterozygosity, intra-breed PCA distance, nearest neighbors, trait-locus frequencies) come from CanVAS (Brundage 2026), harmonized through the Sniff Atlas. The exact release date and verification commit are pinned at the bottom of the page so a researcher can trace a number back to a specific snapshot. The disease-gene-variant graph comes from OMIA (Online Mendelian Inheritance in Animals; Nicholas, Tammen, and the Sydney Informatics Hub at the Sydney School of Veterinary Science, The University of Sydney; retrieved April 2026, DOI 10.25910/2AMR-PV70).

What this page does not yet have. Inheritance modes and per-disease penetrance evidence from Donner 2023 are now in the structured data for every variant the panel covers. Mondo, OMIM, Ensembl, and HGNC cross-references on gene pages remain pending, they arrive in December 2026 alongside the imputed 9.67M-variant CanVAS dataset via the OMIA SQL dump absorption. Until then, gene IDs carry NCBI Gene and OMIA phene URLs only; the wider human-homolog and disease-ontology cross-reference set fills in with that release.

How to cite this page. The computed dimensions on this page are derived from the open Sniff Atlas v1.0.1 (Gehring 2026, doi:10.5281/zenodo.20566358, CC-BY 4.0). Full citation formats including BibTeX, RIS, and CITATION.cff at sniff.world/cite.

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References
  1. Donner J, Freyer J, Davison S, Anderson H, Blades M, Honkanen L, et al. (2023). Genetic prevalence and clinical relevance of canine Mendelian disease variants in over one million dogs. PLOS Genetics 19(2):e1010651. doi:10.1371/journal.pgen.1010651
  2. Brundage J, et al. (2026). CanVAS: a harmonized canine variant atlas. bioRxiv. doi:10.64898/2026.04.13.718238
  3. Nicholas, F.W., Tammen, I., & Sydney Informatics Hub. (2026). Online Mendelian Inheritance in Animals (OMIA) [dataset]. The University of Sydney. https://omia.org. doi:10.25910/2AMR-PV70 (retrieved April 2026).
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Sources: CanVAS (Brundage 2026) · Donner 2023 · OMIA