Pug vs French Bulldog: Which Flat-Faced Breed Is Right for You?

The short answer: a Pug is the smaller, lighter lap dog (ideal 6.3–8.1 kg) built for company and happiest glued to your side, while a Frenchie is a heavier, more muscular dog (ideal 11–12.5 kg) with a bit more bounce and a bolder streak. Both are flat-faced, so both carry real breathing and heat risks. The data suggests Pugs have more eye and weight problems and Frenchies have more spine and ear problems, so the "right" breed comes down to your home, your climate and how ready you are for vet bills.

Pug vs French Bulldog at a glance

Here's the side-by-side comparison, built from breed standards (Dogs Australia and the Royal Kennel Club) and published veterinary studies rather than guesswork.

	Pug	French Bulldog
Origin	China; reached the Netherlands with Dutch traders in the 1500s5	English Toy Bulldogs taken to France by Nottingham lacemakers in the 1800s6,7
Ideal weight (breed standard)	6.3–8.1 kg1,2	Dogs 12.5 kg, bitches 11 kg3,4
Typical weight in UK vet records	Median 8.95 kg8	Median 12.45 kg9
Coat & shedding	Short, fine, soft and glossy; sheds1,5	Short, dense, close-lying; sheds4,6
Standard colours	Silver, apricot, fawn, black1	Brindle, fawn, pied3
Temperament (per standard)	Even-tempered, cheerful, lively1	Vivacious, deeply affectionate, intelligent3
Exercise	Up to 1 hour a day, gentle in warm weather5	Up to 1 hour a day6
Apartment-friendly?	Yes5	Yes6
Kids & other pets	Lower odds of vet-recorded aggression than other dogs8	Lower odds of vet-recorded aggression than other dogs9
Grooming	Weekly brush plus wrinkle care5	Weekly brush plus wrinkle and ear care6
Median lifespan (UK, 2024)	11.6 years16	9.8 years16
Stand-out health risks	BOAS, corneal ulcers, pigmentary keratitis, skin fold infection, obesity8,12	BOAS, ear discharge, skin fold infection, spinal disease9,13,14
Heatstroke odds vs Labrador	3.24 times11	6.49 times11
Cost to budget for in Australia	Specialist airway (BOAS) surgery averaged about $3,000 per dog in one RSPCA Queensland case, and that was only part of the care bill18
Usual Vibrant Hound shirt size	S (chest 49–57 cm)	M (chest 57–67 cm); broad dogs often L

Where do Pugs and French Bulldogs come from?

The Pug: an ancient Chinese companion

The Pug probably grew out of China's love of small, short-faced dogs, and Dutch East India Company traders are thought to have carried them to the Netherlands in the 16th century. When William of Orange took the English throne, his Pugs helped make the breed fashionable with the English aristocracy.⁵ The breed was once a companion to Chinese emperors and later a mascot of the Dutch House of Orange.²⁰ (There's more fun trivia in our 10 interesting facts about Pugs.)

The Frenchie: English lacemakers, Parisian fame

After bull-baiting was banned in England in the 1830s, a small show "Toy Bulldog" became popular. Nottingham lacemakers, pushed out of work by machines, took these little dogs across the Channel to Normandy.⁷ Crossed with other short-faced breeds, they became the French Bulldog within about three decades, complete with those famous bat ears. The breed was a hit in Paris and was recognised by the Kennel Club in 1906.⁶ Our 13 cool facts about French Bulldogs has more.

Pug vs Frenchie size: how different are they really?

More than most people expect. The breed standards put an adult Frenchie at roughly one and a half times the weight of a Pug.^1,3 Real-world dogs drift above the ideal. In UK vet records, the median Pug weighed 8.95 kg and the median Frenchie 12.45 kg.^8,9 A Pug is easier to pick up and carry; a Frenchie feels like a compact little bulldozer on the lead.

Temperament: which is easier to live with?

Both breeds exist mainly to be your mate. The differences are in flavour rather than kind.

• Pugs are described in their standard as even-tempered, cheerful and lively.¹ Dogs Australia notes they are companion dogs that don't cope well when left alone.¹⁹
• Frenchies are described as vivacious, deeply affectionate and intelligent, and the Royal Kennel Club mentions a bold, clownish streak.^3,4

On the "will it be gentle?" question, the vet data is reassuring for both. Pugs had less than a third of the odds of a recorded aggression diagnosis compared with other dogs, and Frenchies also had lower odds.^8,9 Every dog still needs supervision around young kids. If you have little ones, read are French Bulldogs good with kids?

Pug vs French Bulldog health: what the research says

Two large Royal Veterinary College (RVC) VetCompass studies compared each breed with the general UK dog population using vet clinic records.

• Pugs had 1.86 times the odds of being diagnosed with at least one disorder in a year compared with other dogs. The authors concluded the Pug can no longer be considered a typical dog from a health perspective.⁸
• Frenchies had higher odds for 20 of 43 common disorders and lower odds for 11.⁹

Breathing (BOAS): a shared problem

Brachycephalic obstructive airway syndrome (BOAS) is the combination of narrow nostrils, an overlong soft palate and a cramped airway that comes with a flat face. RSPCA Queensland describes it as a lifelong, often progressive disorder that can affect exercise, eating and sleep.¹⁸

• Pugs had 53.92 times the odds of a BOAS diagnosis, and 6.6% had one recorded in a single year.⁸
• Frenchies had 30.89 times the odds, with 5.5% diagnosed.⁹

Those diagnosis rates likely understate it. When University of Cambridge researchers put 604 dogs through formal breathing tests, 64.6% of Pugs and 58.9% of Frenchies were clinically affected (grade II or III). Only 4.8% of Pugs and 10.7% of Frenchies were completely free of signs.¹⁰ Narrow nostrils were a significant predictor in both breeds, so look for wide, open nostrils when you meet a puppy's parents.

Surgery helps but isn't a cure: RSPCA Australia says around 60% of dogs still have compromised breathing after corrective surgery.¹⁷

Eyes: the Pug's weak spot

Prominent eyes are vulnerable. Pugs had 13.01 times the odds of corneal ulceration, with 6.8% diagnosed in one year, against 0.7% of other dogs.⁸ Frenchies were also at higher risk (4.38 times) but far fewer were affected (1.6%).⁹

Pugs also get pigmentary keratitis, where brown pigment creeps across the cornea. In a UK study of 210 Pugs, 91.9% had it in at least one eye.¹² When it spreads across the line of sight it can seriously impair vision. Regular vet eye checks are worth it.

Spine: the Frenchie's weak spot

Frenchies are prone to spinal malformations and disc disease. In a CT study of dogs with no neurological signs, 93.5% of French Bulldogs had hemivertebrae (misshapen vertebrae), compared with 17.6% of Pugs.¹³ Most of those dogs were fine, but Frenchies had 3 times the odds of a spinal cord disorder in UK vet records.⁹ At a French veterinary school, 18.7% of all admitted Frenchies came in with neurological signs, and intervertebral disc herniation made up 45.5% of diagnosed cases.¹⁴ Ramps instead of jumps off the couch are a sensible habit.

Skin, ears and weight

• Skin folds: similar risk in both, about 11 times the odds of skin fold dermatitis.^8,9 Wipe and dry the wrinkles regularly.
• Ears: Frenchies had 14.40 times the odds of ear discharge; Pugs 9.61 times.^8,9
• Weight: here they split. Pugs had 3.89 times the odds of obesity, while Frenchies were actually less likely than average to be recorded as obese.^8,9 Extra kilos make breathing and heat tolerance worse, so keep a Pug lean.

Lifespan: how long do Pugs and Frenchies live?

The biggest study so far (McMillan et al., 2024, over 580,000 UK dogs) found a median lifespan of 11.6 years for Pugs and 9.8 years for French Bulldogs, against 13.1 years for Border Collies and Labradors.¹⁶

You may also see a scary-looking 4.53-year life expectancy for Frenchies from a 2022 RVC study (Pugs: 7.65 years).¹⁵ Treat that with care. The authors point out that Frenchie numbers boomed in the UK in the decade before, so their sample was skewed towards young dogs, which drags the figure down. It still signals that early-life health problems are common in the breed.¹⁵

Which copes better with Aussie heat?

Neither copes well. In a study of more than 900,000 UK dogs, French Bulldogs had 6.49 times and Pugs 3.24 times the odds of heat-related illness compared with Labradors. Flat-faced dogs overall had 2.10 times the odds of medium-faced dogs, and 14.18% of heatstroke cases were fatal.¹¹ And that's the UK, not a Brisbane January.

• Walk at dawn or after dark in summer, and check the footpath with your hand. Our guide on when it's too hot to walk your dog in Australia has temperature guidance.
• Always have shade, water and air-conditioning or a fan available.
• Loud, raspy panting, a dark red tongue, wobbliness or collapse are warning signs. Heatstroke is an emergency: cool your dog with water and get to a vet straight away.

A soaked cooling shirt can help keep your dog more comfortable on warm days. It works by evaporation, so it's most effective in dry heat and less so in very humid weather, and it never replaces shade, water and staying in during the hottest part of the day. We dug into the evidence in do dog cooling shirts work?

Frenchie or Pug: which suits your lifestyle?

Apartment living

Both are rated suitable for flats and apartments.^5,6 If you're up a few flights of stairs, a Pug is easier to carry, and carrying a Frenchie is kinder on its back.

Families with kids

A heavier, more solid Frenchie may suit older, more energetic kids, while a Pug makes a lovely sofa buddy for calmer ones. Either way, teach children not to squeeze or lift the dog and to let it rest when it's puffing.

First-time owners

Personality-wise, both are beginner-friendly; health-wise, neither is low-maintenance. Go in with eyes open: budget for pet insurance and possible airway surgery, buy from a Dogs Australia registered breeder who health-tests their dogs, and be wary of "rare" coloured Pugs, which Dogs Australia warns usually signal cross-breeding.¹⁹ RSPCA Australia also urges buyers to think carefully about dogs with exaggerated features.¹⁷

Clothes fit: dressing a Pug vs a Frenchie

The two breeds rarely share a size. On our size-by-breed chart:

• Pugs usually take a Small: chest 49–57 cm, neck 37–47 cm, back length 31 cm.
• Frenchies usually take a Medium: chest 57–67 cm, neck 41–51 cm, back length 34 cm. Broad, chunky Frenchies often need a Large (chest 65–75 cm).

Breed is only a starting point, because every dog is built a little differently. Size by chest measurement, taken at the widest point just behind the front legs. If your dog falls between sizes, go up one: the 190gsm stretch cotton with 5% spandex gives some room. Your first size exchange is free.

FAQs

Is a Pug or French Bulldog healthier?

Neither is a healthy breed by typical-dog standards. In UK data, Pugs live a little longer on average (11.6 vs 9.8 years median) and have a lower heatstroke risk, but they have more eye problems and obesity.^8,11,16 Frenchies carry more spinal and ear risk.^9,13

Which is bigger, a Pug or a Frenchie?

The Frenchie. Its breed standard ideal is 11–12.5 kg versus 6.3–8.1 kg for a Pug.^1,3 In clothing terms, that's usually a Medium for a Frenchie and a Small for a Pug.

Are Pugs and Frenchies OK in Queensland summers?

Only with careful management. Both are at much higher risk of heatstroke than average dogs, Frenchies especially.¹¹ Walk them only in the coolest parts of the day, keep them indoors in the heat, and see a vet immediately if they struggle to breathe or collapse.

How much exercise does a Pug or Frenchie need?

The Royal Kennel Club suggests up to an hour a day for both.^5,6 One Australian Pug breeder interviewed by Dogs Australia walks her dogs about 3 km a day in the cooler months.¹⁹ In summer, shorten walks and keep them to the coolest parts of the day.

The verdict

Pick a Pug if you want a smaller shadow and will police the treat jar and watch those eyes. Pick a Frenchie if you want a sturdier, cheekier dog and can manage a sensitive back and even lower heat tolerance. Either way, look for open nostrils and a moderate face, and plan your summers around keeping them cool.

References

1. Dogs Australia. Pug Breed Standard.
2. The Royal Kennel Club. Pug breed standard.
3. Dogs Australia. French Bulldog breed standard.
4. The Royal Kennel Club. French Bulldog breed standard.
5. The Royal Kennel Club. Pug: breed information.
6. The Royal Kennel Club. French Bulldog: breed information.
7. American Kennel Club. Behind the Breed: History of the French Bulldog.
8. O'Neill DG, Sahota J, Brodbelt DC, et al. (2022). Health of Pug dogs in the UK: disorder predispositions and protections. Canine Medicine and Genetics 9:4.
9. O'Neill DG, Packer RMA, Francis P, et al. (2021). French Bulldogs differ to other dogs in the UK in propensity for many common disorders: a VetCompass study. Canine Medicine and Genetics 8:13.
10. Liu NC, Troconis EL, Kalmar L, et al. (2017). Conformational risk factors of brachycephalic obstructive airway syndrome (BOAS) in pugs, French bulldogs, and bulldogs. PLoS One 12(8):e0181928.
11. Hall EJ, Carter AJ, O'Neill DG (2020). Incidence and risk factors for heat-related illness (heatstroke) in UK dogs under primary veterinary care in 2016. Scientific Reports.
12. Maini S, Everson R, Dawson C, et al. (2019). Pigmentary keratitis in pugs in the United Kingdom: prevalence and associated features. BMC Veterinary Research 15:384.
13. Ryan R, Gutierrez-Quintana R, ter Haar G, De Decker S (2017). Prevalence of thoracic vertebral malformations in French bulldogs, Pugs and English bulldogs with and without associated neurological deficits. The Veterinary Journal 221:25–29.
14. Mayousse V, Desquilbet L, Jeandel A, Blot S (2017). Prevalence of neurological disorders in French bulldog: a retrospective study of 343 cases (2002–2016). BMC Veterinary Research.
15. Teng KT, Brodbelt DC, Pegram C, Church DB, O'Neill DG (2022). Life tables of annual life expectancy and mortality for companion dogs in the United Kingdom. Scientific Reports 12:6415.
16. McMillan KM, Bielby J, Williams CL, et al. (2024). Author Correction: Longevity of companion dog breeds: those at risk from early death. Scientific Reports 14:8772 (original article doi:10.1038/s41598-023-50458-w).
17. RSPCA Australia. The conversation we need to be having about brachycephalic dog breeds.
18. RSPCA Queensland. Cute but complicated: French Bulldog facts.
19. Dogs Australia. What to Look for When Buying a Pug Puppy.
20. American Kennel Club. Pug dog breed information.