No Mastiffs listed on LocalPetFinder right now
That just means none are on the site at the moment, not that the breed is unavailable. New listings arrive from rescues and local owners all the time. Be first in line, or help one find a home.
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Mastiffs in St. John's, right now
We aren't tracking any adoptable Mastiffs in or near St. John's at the moment. Listings update regularly as Newfoundland rescues take in new dogs, and a Mastiff in St. John's typically gets adopted within days of being posted. Browse the full Newfoundland dogs list to see Mastiffs in other Newfoundland cities, or save this page and check back soon.
See every adoptable Mastiff across Newfoundland and Labrador →
Adopting a Mastiff in Newfoundland and Labrador
The English Mastiff is one of the heaviest dog breeds on earth, commonly 120 to 200-plus pounds, and one of the calmest: a dignified, affectionate giant that mostly wants a soft spot near its people. They are low-energy and gentle, with an old guardian instinct that rarely needs more than their presence. This page pulls every adoptable Mastiff and Mastiff cross from the Newfoundland shelters we cover into one place, refreshed regularly.
Mastiffs reach rescue when their scale, food, drool, or vet costs proved more than a household expected. Be honest about space, vehicle, and budget before applying; everything about this breed is at giant scale.
Giant-scale realities: drool, joints, bloat, and lifespan
Live with a Mastiff and you accept drool on the walls, a dog that outweighs most adults, and a shorter window: 6 to 10 years is typical. The health checklist mirrors other giants: hip and elbow dysplasia (keep them lean, always), bloat (know the emergency signs: unproductive retching, swollen belly, distress), and heart conditions. Soft orthopedic bedding protects pressure points, and moderate walks beat long runs; their joints are not built for jogging.
Temperament-wise a well-socialized Mastiff is famously patient with children, though sheer bulk means supervision around small kids. The short coat handles Newfoundland cold reasonably well with shelter and short-outing sense in the worst weather. Newfoundland rescues provide a veterinary assessment before adoption.
Looking more broadly? Browse every adoptable dog across the province on Dog Adoption Newfoundland and Labrador.
Mastiff Adoption FAQ — St. John's
How many Mastiffs are available for adoption in St. John's?
As of August 2026, there are no Mastiffs listed in St. John's rescue on LocalPetFinder right now — Mastiffs are among the rarer dogs in local rescue. Inventory turns over quickly, so setting an alert is the most reliable way to catch one, or consider an adoptable Mastiff mix.
Where can I adopt a Mastiff near me in Newfoundland?
Mastiffs and Mastiff crosses are uncommon in Newfoundland rescue, usually arriving when their scale or costs became too much for a previous home. This page aggregates every adoptable one from the Newfoundland shelters we cover; set an alert, and make sure your space, vehicle, and budget genuinely fit a 150-pound dog first.
Are Mastiffs good family dogs?
Yes, famously gentle and patient with their families, including children. The practical realities are bulk (a leaning Mastiff can topple a toddler), drool, and space. They are calm, low-energy housemates that need moderate walks rather than athletic outlets. Ask the rescue about the individual dog's history with kids and other pets.
How much does it cost to keep a Mastiff?
More than most breeds, at every line: giant-breed food portions, larger doses of preventives and medications, higher surgical and boarding costs, and bigger everything from crates to beds. Adopters should budget honestly before applying. The adoption fee itself (roughly $300 to $600) is the cheapest part of Mastiff ownership.
Should I buy or adopt a Mastiff in Newfoundland?
Adopt. An adult rescue Mastiff's size, temperament, and joint health are already known, and you skip the giant-puppy destruction phase. Fees run roughly $300 to $600 and include spay or neuter, vaccinations, and a microchip. Whatever the source, keep the dog lean for life; it is the single best thing you can do for a giant breed's joints and lifespan.
Are these Mastiffs for sale in St. John's?
Not for sale, for adoption, which is usually the better deal. Every Mastiff here comes from a St. John's-area rescue or shelter, not a breeder, pet store, or classified seller. Adoption fees are typically a few hundred dollars and already include spay or neuter, vaccinations, and a microchip, versus roughly $2,000 to $5,000+ to buy a Mastiff from a breeder. If you searched "mastiff for sale St. John's," adopting gets you a healthy, vetted dog for a fraction of the price.
Where can I buy a Mastiff in St. John's, and should I?
You can buy from a registered breeder, but it is worth weighing against adoption first. A reputable Mastiff breeder typically charges $2,000 to $5,000+ and often has a waitlist, while a rescue Mastiff costs a few hundred dollars fully vetted and may be available now. Be cautious of cheap "for sale" ads on classified sites and marketplaces, which are frequently backyard breeders or puppy-mill resellers with unvetted, sometimes sick animals and no health guarantee. If you do buy, insist on meeting the parents, seeing where the litter was raised, and getting vet records. For most St. John's families, adopting a rescue Mastiff is cheaper, faster, and gives a dog in need a home.