| Size at withers | 58–68 cm |
|---|---|
| Weight range | 45–70 kg |
| Life expectancy | 5–8 years (shortest of any breed) |
| Size class | Giant (> 40 kg) |
| Normal resting vitals | Heart rate 60–100 bpm · Respiration 10–30/min · Temperature 38.3–39.2 °C |
| Coat | Short, fine coat; wrinkled head |
| Temperament | Loyal, courageous, patient; the 'French Mastiff' |
| Common health issues | Hip and elbow dysplasia; cardiomyopathy; brachycephalic airway; gastric torsion; skin fold dermatitis |
| Exercise needs | Moderate |
| Climate & housing suitability | Poorly suited to hot climates; heat tolerance is limited and lowland heat is a risk. Best in temperate climates. |
| Owner notes | A French mastiff and one of the shortest-lived breeds; the brachycephalic conformation raises welfare concerns. |
Origin and purpose
Working (AKC). Origin: France.
A French mastiff and one of the shortest-lived breeds; the brachycephalic conformation raises welfare concerns.
What a breed was built to do explains most of what it will do in your home. A dog selected for hundreds of years to run, guard, herd, or hunt does not stop wanting to because it now lives in an apartment — the drive is the breed, and the owner's job is to give it somewhere to go.
Temperament and training
Stated temperament: Loyal, courageous, patient; the 'French Mastiff'
Reward-based training from the day the puppy arrives, with the socialisation window (roughly three to sixteen weeks) treated as the priority it is — what happens in those weeks shapes the adult dog more than anything you do later. Short, frequent, positive sessions. See Parts IV and IX.
Conditions this breed is predisposed to
Gastric dilatation and volvulus (GDV, 'bloat')
Brachycephalic obstructive airway syndrome (BOAS)
Dilated cardiomyopathy (DCM)
Elbow dysplasia
Skin fold dermatitis
Health screening — what to test, and when
| Screen for | Test | When |
|---|---|---|
| Brachycephalic obstructive airway syndrome (BOAS) | BOAS functional grading (an exercise-tolerance assessment) | Before breeding, and before any anaesthetic — and before buying the puppy |
| Dilated cardiomyopathy (DCM) | Cardiac auscultation, echocardiography, and Holter monitoring | Annually from 2–3 years in predisposed breeds — DCM is silent until it is not |
| Elbow dysplasia | Radiographic elbow evaluation | Once at 12–24 months |
| Gastric dilatation and volvulus (GDV, 'bloat') | No screening test. Discuss preventive gastropexy with your vet in deep-chested breeds | At neutering, if the vet agrees it is indicated |
Every dog, every breed: an annual health examination (twice yearly from seven years), body-condition scoring at each visit, dental assessment, year-round parasite control, and the core vaccinations.
For breeders — test before you mate
- Brachycephalic obstructive airway syndrome (BOAS) — BOAS functional grading (an exercise-tolerance assessment)
- Dilated cardiomyopathy (DCM) — Cardiac auscultation, echocardiography, and Holter monitoring
- Elbow dysplasia — Radiographic elbow evaluation
- Gastric dilatation and volvulus (GDV, 'bloat') — No screening test. Discuss preventive gastropexy with your vet in deep-chested breeds
Feeding
Slow, controlled growth is essential — giant-breed puppies grow for eighteen months or more, and pushing that growth with over-feeding or calcium supplementation causes lasting orthopaedic damage. Use a diet formulated for large- or giant-breed growth and keep the puppy visibly lean. As an adult, two measured meals a day, never one large one. Feeding costs are substantial and should be budgeted before acquiring the dog.
Exercise and enrichment
Stated requirement: Moderate
Moderate daily exercise plus mental stimulation. Adaptable to apartment life provided the daily walk actually happens every day.
Coat and grooming
Short, fine coat; wrinkled head. Weekly brush; clean and dry the head wrinkles.
Climate and living conditions
Stated suitability: Poorly suited to hot climates; heat tolerance is limited and lowland heat is a risk. Best in temperate climates.
Ageing and senior care
Life expectancy: 5–8 years (shortest of any breed). This dog is a senior from around 5–6 years, at which point wellness examinations should move to twice a year and senior blood and urine screening begins. Giant breeds age fast and live short lives, and this is the hardest fact about owning one. Senior screening should start early, orthopaedic support matters from middle age, and cardiac and bone cancer risks are real. Go in with your eyes open. Senior care →
Before you take one home
- Ask the breeder for the health-test results listed above — for BOTH parents, on paper, before you pay a deposit. A breeder who has done the tests will be proud to show you; one who deflects, or who tells you the tests are unnecessary in this line, is telling you what you need to know.
- This is a short-skulled breed. Choose the puppy with the most open nostrils and the longest muzzle you can find, and reject any that snores, snorts, or struggles for breath at rest — those are not endearing breed traits, they are signs of a dog that cannot breathe properly. Ask whether the parents have been BOAS-graded. In a hot climate this decision has consequences you will live with daily.
- Consider adoption. Shelters and rescues have dogs of every kind, including purebreds, and the local native or landrace dog is often healthier, better adapted to its climate, and more in need of a home than almost anything you can buy. See Part XII.
