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Mastiff puppies and dogs in Toronto, Ontario

Looking for a Mastiff puppy or dog in Toronto, Ontario? Adopt a Pet can help you find an adorable Mastiff near you.

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Adopt a Mastiff near you in Toronto, Ontario

These Mastiffs are available in Toronto, Ontario.
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HK

Mastiff

Male, 6 yrs
Toronto, ON
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
House-trained, Spayed or Neutered, Shots are up-to-date,
Story
Meet HK, an all-star walking companion who is frequently called the best guy by the volunteers and staff who adore him! If you are looking for a clever, treat-motivated dog who loves to learn, HK is ready to impress you. HK is a sweet and enthusiastic gentleman who is an absolute joy to take on outdoor adventures. HK loves spending time with his people — he’ll happily lean in for cuddles and soak up all the affection you’re willing to give. His favorite things include treats, exploring new places, and being your loyal sidekick wherever the day takes you. Recently during training games, he has been displaying excellent handler focus. Responsive to verbal encouragement, he has learned to happily check in and disengage from distractions for a tasty treat. After a fun, engaging walk, he loves winding down with a great petting session and lots of affection. HK may be happiest as the only dog in the home, where he can soak up all the attention and continue building his confidence out in the world. If you are looking for a smart, loving partner for your daily walks, couch cuddles and training adventures, come meet HK today!

Or, how about these Mastiffs in cities near Toronto, Ontario

These Mastiffs are available for adoption close to Toronto, Ontario.
Photo of India

India

Mastiff Rottweiler

Female, Adult
Toronto, ON
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Good with kids, House-trained, Spayed or Neutered,
Story
India Rottweiler/Boxer/Dogo Argentino mix (short coat) Large Adult Female   This gorgeous brindle gal is India a 4 year old, 100 pound mixed breed dog who will be up to date on her veterinary care and spayed prior to adoption.  Her current family is not able to provide her with the time or care she deserves.   India is housetrained and crate trained, although, a crate has not been used in the past year or so.  She is used to living in an apartment and is said to be quiet and comfortable being left alone while her family works full-time hours.  She may whine initially when left in a new environment.  She enjoys daily walks for exercise and to do her business.   India is a Mastiff mix, and as such, will most likely become very attached to her family members but may initially be a bit wary of new people and animals.  She warms up to women more quickly than men.  India is currently living with 2 toddlers and is good with them.   India has very limited experience with other dogs and has not lived with another dog.  She has a Husky friend she likes to interact with on leash.  She may react to other dogs when on leash walks who are as far away as on the other side of the street and needs a strong and confident owner to help her work through this behaviour using positive reinforcement based methods.  She has also never lived with a cat.   Her family is able to bathe and brush her and she has been professionally groomed.  Her regular groomer says she is good for grooms.  At the veterinarian, she is muzzled for invasive handling.  Muzzles can be a great tool to help dog handlers feel safe.   If you are looking for a loyal, large breed dog to snuggle with on the couch and believe you can provide India with the care she deserves, please fill out the Adoption Application on our website.       Due to time constraints, we cannot respond to every email asking for more information on a dog. Please carefully review the bio for the dog and our adoption process https://www.speakingofdogs.com/adoption/adoption-process/.  If you are still interested in adopting, please fill out the adoption application form at the bottom of that page. August 20, 2026, 11:09 pm
Photo of HK

HK

Mastiff

Male, 6 yrs
Toronto, ON
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
House-trained, Spayed or Neutered, Shots are up-to-date,
Story
Meet HK, an all-star walking companion who is frequently called the best guy by the volunteers and staff who adore him! If you are looking for a clever, treat-motivated dog who loves to learn, HK is ready to impress you. HK is a sweet and enthusiastic gentleman who is an absolute joy to take on outdoor adventures. HK loves spending time with his people — he’ll happily lean in for cuddles and soak up all the affection you’re willing to give. His favorite things include treats, exploring new places, and being your loyal sidekick wherever the day takes you. Recently during training games, he has been displaying excellent handler focus. Responsive to verbal encouragement, he has learned to happily check in and disengage from distractions for a tasty treat. After a fun, engaging walk, he loves winding down with a great petting session and lots of affection. HK may be happiest as the only dog in the home, where he can soak up all the attention and continue building his confidence out in the world. If you are looking for a smart, loving partner for your daily walks, couch cuddles and training adventures, come meet HK today!
Photo of Kodiak

Kodiak

Mastiff

Male, 10 yrs 5 mos
King City, ON
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Not good with kids, Not good with dogs, Not good with cats, Needs experienced adopter, Spayed or Neutered, Shots are up-to-date,
Story
Kodiak is the true definition of an adventure buddy! Do you enjoy hiking, running, biking, swimming or exploring? Kodiak is the perfect dog for you! In fact he is already and waiting at the door for you! He is an intelligent dog who is capable of learning extremely quickly. He already knows the commands sit, down, stay, come, and speak! Kodiak’s greatest strength is his loyalty; Up or down, good or bad, happy or sad it will be Kodiak and you against the world. What makes Kodiak special is that he has so much love to give. The exact reasons you are looking for a dog are the same reason Kodiak desperately wants his forever human. He will need a very active adult-only family to drain his energy in order to keep him happy. Kodiak is looking for an experienced and confident owner to continue working on his reactivity to dogs and new people. He will need a strong leader to slowly introduce him to new people using the methods he has been taught while at Dog Tales. Kodiak is not friendly with strangers, children or other animals. Therefore he will need to live in a house with a fully fenced backyard. Once he is comfortable with a person he will become very attached and a great listener. Kodiak is looking for his chance with someone special. Upon adoption, Dog Tales can provide training for Kodiak and you in order to set you up for success.
Photo of Preacher

Preacher

Mastiff

Male, Young
King City, ON
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
-
Story
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Photo of Thor

Thor

Mastiff American Bulldog

Male, Adult
Keswick, ON
Size
(when grown) -
Details
Spayed or Neutered,
Story
Hello there! My name is Thor, Male - neuteredMastiff x American Bulldog MixApprox. 2 years oldI'm a big, lovable marshmallow wrapped in an even bigger package. My heart is as large as my frame, and I'm eager to share all the love I have with my forever family. I tend to form strong attachments to my favourite individuals, protecting them from unknowns though I am focused on establishing positive boundaries with the help of my shelter friends. When it comes to people, I'm friendly but can get a little nervous, especially around sudden movements. I thrive best with slow and gentle introductions. Once I feel comfortable, I transform into your classic wiggle bug, ready to make friends and soak up all the affection you have to offer.I enjoy my meals at a normal pace, but what really gets my tail wagging is praise, treats, and spending time with people. I'm highly motivated by love and snacks, which makes training and bonding with me a rewarding experience. I can become protective over toys, so I would do best in a trade-off situation or with gradually introduced toys once I'm settled into my new home. Too much excitement too quickly can be overwhelming for me.I'm still working on my basic training, which means we can learn together. With your guidance and a few tasty treats, I'm sure to pick up on commands and become the well-mannered companion you're searching for.Given my energy and size, I would thrive in a quiet home without young children-preferably with kids aged 12 years or older. I can be selective with doggy friends, but with a slow introduction, I may have the potential to socialize successfully. I do have a prey drive towards cats and would require a home without feline friends.If you're looking for a gentle giant who will fill your home with love and laughter, I'm your guy. Primary Color: Black Brindle Secondary Color: Black Brindle Weight: 41.007 Age: 2yrs 3mths 1wks
Photo of Ferris (20260811-03)

Ferris (20260811-03)

Mastiff Mixed Breed (Medium)

Male, Young
Niagara Falls, ON
Size
(when grown) Med. 26-60 lbs (12-27 kg)
Details
Good with kids, Good with dogs,
Story
Ferris is a gentle, shy little soul who just needs some time and patience to feel comfortable. Once he begins to feel safe, his sweet personality starts to shine through. Ferris is good with kids and other dogs and would love a family who can help build his confidence and show him just how wonderful life in a loving home can be. With a patient family, lots of love, and positive experiences, this little one has all the potential to grow into a wonderful, loyal companion. If you're looking for a sweet puppy to welcome into your family and help blossom into their best self, Ferris may be the perfect match. Good with women: yes Good with men: yes Good with kids: yes Good with other dogs: yes Good with cats: no exposure House trained: working on it Crate trained: working on it Energy level: high-puppy Can be handled/touched: yes Barker: no Flight risk: All newly adopted or fostered dogs are a flight risk Food aggressive: no Current food: Walks on leash: working on it Leash reactive to people or dogs: no Rides well in car: yes Destructive: puppy Needs a home with a yard: yes Needs a home with another dog: no Can live in an apartment: no Please visit our website niagaradogrescue.com to learn more about this amazing pet and to see other available dogs.

These pups are in Toronto, Ontario too!

Below are our newest added Mastiffs available for adoption in Toronto, Ontario. To see more adoptable Mastiffs in Toronto, Ontario, use the search tool below to enter specific criteria!
Photo of Karma

Karma

St. Bernard Australian Shepherd

Male, 9 yrs 4 mos
Toronto, ON
Size
(when grown) Med. 26-60 lbs (12-27 kg)
Details
Good with kids, Good with dogs, Good with cats, House-trained, Spayed or Neutered, Shots are up-to-date,
Story
Meet Karma who 9 Years Young Being fostered in the Grafton, ON area Karma is a gentle, low-energy boy who truly lives up to his name. At 9 years old, he is the definition of a perfect houseguest. He is calm, respectful, and easy to have around. He gets along wonderfully with other dogs, including small ones, and handled meeting a new male visitor (even one with a beard!) like a pro. Karma is aware of cats and may bark at them, but he has not shown any interest in chasing. This sweet soul loves being close to his people and is happiest just hanging out by your side. He walks politely on leash and settles beautifully in the home. At night, he sleeps peacefully in a dog bed beside you, and when left alone for short periods, he simply naps with no messes, no destruction. After spending about a year in a shelter environment, Karma may have lost some muscle tone, but with a loving home and gentle exercise, he’s sure to regain his strength and continue to thrive. Karma is looking for a calm, loving home where he can finally relax and enjoy the life he deserves. If you’re looking for a loyal, easygoing companion, Karma might just be your perfect match. Apply to adopt today! If you are interested in Mr Karma the chill dog please fill out an adoption application.

Search for a Mastiff puppy or dog

Use the search tool below to browse adoptable Mastiff puppies and adults Mastiff in Toronto, Ontario.

Mastiff puppies and dogs in nearby cities

Related breeds in Toronto, Ontario

Mastiff shelters & rescues in Toronto, Ontario

There are animal shelters and rescues that focus specifically on finding great homes for Mastiff puppies in Toronto, Ontario. Browse these Mastiff rescues and shelters below.

Here are a few organizations closest to you:

Rescue

2.8 miles

Speaking of Dogs Rescue

Toronto, ON M9W 3L8

Pet Types: dogs

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Shelter

9.1 miles

Toronto Humane Society

11 River Street, Toronto, ON M5A 4C2

Pet Types: cats, birds, dogs, rabbits, reptiles, small animals

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Rescue

15.5 miles

Dog Tales Rescue and Sanctuary

1405 19th Sideroad, King City, ON L7B 1K5

Pet Types: cats, dogs

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Shelter

36.7 miles

Georgina Animal Shelter and Adoption Centre

26815 Civic Centre Road, Keswick, ON L4P 3G1

Pet Types: cats, dogs

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Rescue

38.7 miles

Niagara Dog Rescue

Niagara Falls, ON L0S 1J0

Pet Types: dogs

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Rescue

39.6 miles

Alliston & District Humane Society

5545 Tosorontio Concession 4, Everett, ON L0M 1J0

Pet Types: cats, birds, dogs, rabbits, small animals

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Looking for a specific shelter or rescue?

If you're not seeing what you're looking for, try our shelter and rescue search. We have more than 17,000 organizations in our database with furry pals waiting for a new home!

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Want to learn more about adopting a Mastiff puppy or dog?

We've got all the info you need on adopting and caring for a Mastiff puppy. Check out the links below for everything you ever wanted to know about Mastiff puppies and adults.

Mastiff basics

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Where do Mastiffs come from? How many types of Mastiffs are there? From the history of the breed to question about average height, weight and size, brush up on these basic facts about the Mastiff.

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