Mastiff
About the Mastiff
Mastiffs originated in England but their ancestry dates back to ancient times, with mastiff-type dogs documented in Babylon and Egypt. These massive, powerful dogs were used for hunting large game and guarding estates. Modern Mastiffs retain their impressive size and calm, dignified temperament.
Temperament
Mastiffs are calm, dignified, and gentle giants who form strong bonds with their families despite their imposing size. They're protective of loved ones but are naturally calm and even-tempered, rarely aggressive.
Care Guide
Moderate exercise (30-45 minutes daily) is sufficient; excessive exertion in puppyhood damages joints. Their short coat requires occasional brushing. Their massive size creates significant stress on joints; careful diet management and avoiding jumping are important. Monitor for hip dysplasia and bloat.
Did you know?
Ancient Mastiffs were so valued that they were documented in cuneiform writings and were depicted alongside kings in ancient Mesopotamian art.
Mastiff weight by age
Broad planning estimates derived from adult breed weights; individual dogs vary by build, sex and neuter status
Age
8 weeks
Planning estimate
9.5-16 kg
Bring-home baseline; compare weekly, not daily.
Age
3 months
Planning estimate
17-25 kg
Growth should be visible but ribs should still be easy to feel.
Age
6 months
Planning estimate
38-51 kg
Many puppies look lanky here. Avoid overfeeding to make them fill out.
Age
12 months
Planning estimate
65-79 kg
Small breeds may be adult; large breeds may still be maturing.
Age
Adult
Planning estimate
71-87 kg
Use body condition score with your vet, not weight alone.
These are not diagnostic ranges. Woofio will replace them with owner-reported averages once enough dogs are tracked by age, sex and body condition.
Check your dog's weight
Planning estimate only — not diagnostic. Confirm with your vet.
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Feeding guide for Mastiff
General feeding rhythm by size; use your food label and vet advice for exact portions
Puppy meals
3-4 measured meals/day
Adult meals
2 meals/day
Best practice
Prioritise controlled calories and joint-safe growth
First 30 days with a Mastiff puppy
The early routine that prevents most avoidable stress
Book the first vet visit
Take vaccination history, microchip details, food label, and any breeder or rescue paperwork.
Choose one food and transition slowly
Keep the puppy on the same food for the first few days, then transition over 5-7 days if changing.
Start toilet and crate routines
Use short, predictable routines after sleep, meals, play, and before bedtime.
Handle paws, ears and mouth daily
Gentle handling now makes grooming, nail trims and vet checks much easier later.
Vaccination timeline
Core and non-core timing can vary by country, product and vet protocol
Intranasal or injectable. Required for boarding/daycare.
Core combination. Puppy series at 8/12/16w, booster at 1yr, then every 1-3yr.
Recommended for dogs with water/wildlife exposure.
First dose at 12w, booster at 1yr, then every 1-3yr per local law.
Parasite prevention
Flea, tick, worm, and heartworm schedule
Treatment calendar (indicative)
Green = treatment month. Always follow your vet's specific product instructions.
Health checks to discuss
Screening reminders to confirm with your vet for Mastiff dogs
R1 source review: legacy breed-screening row normalized with a public registry or parent-club source URL.
R1 source review: legacy breed-screening row normalized with a public registry or parent-club source URL.
R1 source review: legacy breed-screening row normalized with a public registry or parent-club source URL.
R1 source review: legacy breed-screening row normalized with a public registry or parent-club source URL.
Grooming guide
short, straight, coarse outer coat coat · Lower-maintenance coat; check weekly and brush monthly
Common tools to discuss
Routine starting points
Exercise & mental stimulation
low energy · 30-45 min/day
Daily exercise estimate
30-45 min/day
Gentle walks, relaxed play
Mental enrichment
Adjust exercise for age, heat, breathing, joint health and your vet's advice. Puppies need shorter sessions than adults.
Health risks to discuss
Conditions listed as more common in Mastiff dogs; ask your vet what matters for your dog
This list represents conditions with elevated prevalence in this breed. It does not mean your dog will develop them. Early screening and regular vet checks significantly reduce risk.
When to call a vet
Do not wait for community answers when symptoms are urgent
Common Mastiff owner questions
Short answers for the questions new owners search most often
How much should a Mastiff weigh?
Mastiff weight depends on sex, frame and body condition. The age table is a planning estimate derived from adult breed weights, so confirm with your vet if your dog is gaining or losing quickly.
How often should I groom a Mastiff?
Mastiff grooming is usually low. Brush more often during shedding, after muddy walks, or if you notice mats forming.
What should new Mastiff puppy owners do first?
Book a first vet visit, confirm vaccine history, keep food consistent for the first few days, and start a calm toilet, sleep and handling routine.
Owner reports and vet answers
Coming next: community data that improves this page over time
Weight by age, food amount, activity level, grooming frequency and common owner concerns, filtered by sex and age once enough reports exist.
Sources and review
Woofio separates official guidance, breed-specific screening references and future owner-reported averages.
WSAVA vaccination guidelines
Global small-animal veterinary guidance used for core and non-core vaccine framing.
OFA / CHIC breed screening
Breed-specific health screening protocols developed with parent breed clubs.
Royal Kennel Club health testing
UK health testing, screening schemes and breed health resources.
ESCCAP parasite guidelines
European parasite guidance for companion animals.
CAPC parasite guidelines
US companion animal parasite guidance and regional parasite risk resources.
Track all of this for your dog
The Woofio app puts your dog's entire health calendar on your phone — vaccine reminders, weight tracking, vet & groomer bookings, and more.
Something not right about Mastiff?
Our breed profiles use the available breed data we have today and will improve as owners submit real-world reports. If you spot something inaccurate or missing, tell us so we can tighten the plan for every Mastiff owner.