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Mastiff puppies and dogs in O Fallon, Missouri

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

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Adopt a Mastiff near you Mastiff in cities near O Fallon, Missouri Other pups in O Fallon, Missouri Search for a Mastiff puppy or dog near you Browse Mastiff puppies and dogs in nearby cities Browse related breeds in O Fallon, Missouri Mastiff shelters and rescues in O Fallon, Missouri Learn more about adopting a Mastiff puppy or dog

Adopt a Mastiff near you in O Fallon, Missouri

These Mastiffs are available in O Fallon, Missouri.
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JOCKO

Labrador Retriever Mastiff

Male, 2 yrs 9 mos
St. Peters, MO
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Spayed or Neutered,
Story
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Or, how about these Mastiffs in cities near O Fallon, Missouri

These Mastiffs are available for adoption close to O Fallon, Missouri.
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Luke AG

Mastiff American Pit Bull Terrier

Male, 4 yrs 4 mos
St Louis, MO
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Good with kids, Good with dogs, Not good with cats, Spayed or Neutered,
Story
Hi, I’m Luke, and I’m a big, lovable boy tipping the scales at just over 100 lbs! Don’t let my size fool you—I’m a happy, easygoing pup who just wants to play, explore, and cuddle. I’m all about the good things in life: squeaky toys, water play, long walks, and best of all—snuggle time on the couch. I’m a pro at giving hugs (though I’m working on not jumping up too hard to give them—oops!). I get along great with other dogs and kids, but because of my size and enthusiasm, I’d do best with older children who won’t get accidentally knocked over during playtime. I’m crate trained, housebroken, and walk nicely on a leash—unless there’s a squirrel… then it’s game on! I do have a slight prey drive, so a little guidance goes a long way. If you’re looking for a big-hearted, playful companion to fill your home with love (and maybe take up some space on your couch), I’m your guy. Let’s make forever happen! 🐾 Local adoption fee is $200(in TX) Out of state adoption fee is $450 (includes transport to your area)

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Photo of Finn AKA Gage JuM

Finn AKA Gage JuM

Mastiff Shepherd (Unknown Type)

Male, 7 yrs 3 mos
St Louis, MO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with dogs, Spayed or Neutered,
Story
Finn may look like a rockstar with his striking Mastiff–Shepherd good looks, but at heart, he’s a big, soft lovebug. Weighing in at about 60 pounds, Finn has grown into a handsome boy with a beautiful gray and tan coat, soulful eyes, and an even bigger personality. Despite his star-quality appearance, Finn is more of a laid-back, easygoing guy—think Eeyore vibes, but with engines revved and ready to love. From the moment he wakes up, he’s prepared to shower his people with affection… and trust us, it’s A LOT of love! Finn does well with other dogs and does need a slow, proper introductions to new friends—both two-legged and four-legged. Once he knows you, he loves you deeply. He’s happiest when he has a buddy (human or canine) to share his world with. Affection is Finn’s specialty. When someone comes to greet him, he lights up, runs over with enthusiasm, and hands out slobbery kisses and big hugs like they’re backstage passes. His joy is genuine, his heart is huge, and he’s always thrilled to see his people. If you’re looking for a big, lovable, slightly goofy rockstar who will adore you endlessly, Finn is ready to take center stage in your heart. Local adoption only $200 (in TX)

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Photo of HIPPIE

HIPPIE

Mastiff

Female, 1 yr 2 mos
St. Louis, MO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Spayed or Neutered,
Story
Hippie is a social, sweet girl who loves being wherever her people are. She enjoys plenty of pets, walks beautifully on the leash, and is always happy to stay close by for companionship. With her loving personality, Hippie is the perfect partner!

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Ocean

Mastiff Great Pyrenees

Female, 1 mo
St. Louis, MO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with kids, Good with dogs, Good with cats, Spayed or Neutered, Shots are up-to-date,
Story
Meet this splashingly adorable puddle of puppies! Introducing Cove, Sea, Brook, Ocean, Reef, Harbor, Bayou, Lake & Creek! They are ready to send waves of love, fun, and playfulness right into your homes. Born to their mama Freya, these pups are going to make excellent dogs. They are a great mix of Great Pyrenees, Mastiff and who knows what- so they are sure to be big pups. NOTE: They will be available to meet at the PetSmart Adoption Event in Springfield, MO on Saturday, June 20. Come meet them and take one home! If you're interested in adopting me, please fill out an application at www.polkcountyhumanesociety.org/adopt. You can also reserve an appointment to meet me. Some pets are in foster homes or may already have visits scheduled, so appointments help ensure I’ll be available. Polk County Humane Society is located in Bolivar, Missouri, and we welcome adopters from any state. We have access to a transport to Aurora, CO. Other out of state adopters either travel to Missouri or arrange & pay for air transport. Virtual meet and greets are available on the appointment request. ##2755256##

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Photo of Reef

Reef

Mastiff Great Pyrenees

Male, 1 mo
St. Louis, MO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with kids, Good with dogs, Good with cats, Spayed or Neutered, Shots are up-to-date,
Story
Meet this splashingly adorable puddle of puppies! Introducing Cove, Sea, Brook, Ocean, Reef, Harbor, Bayou, Lake & Creek! They are ready to send waves of love, fun, and playfulness right into your homes. Born to their mama Freya, these pups are going to make excellent dogs. They are a great mix of Great Pyrenees, Mastiff and who knows what- so they are sure to be big pups. NOTE: They will be available to meet at the PetSmart Adoption Event in Springfield, MO on Saturday, June 20. Come meet them and take one home! If you're interested in adopting me, please fill out an application at www.polkcountyhumanesociety.org/adopt. You can also reserve an appointment to meet me. Some pets are in foster homes or may already have visits scheduled, so appointments help ensure I’ll be available. Polk County Humane Society is located in Bolivar, Missouri, and we welcome adopters from any state. We have access to a transport to Aurora, CO. Other out of state adopters either travel to Missouri or arrange & pay for air transport. Virtual meet and greets are available on the appointment request. ##2755257##

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Photo of Cove

Cove

Mastiff Great Pyrenees

Female, 1 mo
St. Louis, MO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with kids, Good with dogs, Good with cats, Spayed or Neutered, Shots are up-to-date,
Story
Meet this splashingly adorable puddle of puppies! Introducing Cove, Sea, Brook, Ocean, Reef, Harbor, Bayou, Lake & Creek! They are ready to send waves of love, fun, and playfulness right into your homes. Born to their mama Freya, these pups are going to make excellent dogs. They are a great mix of Great Pyrenees, Mastiff and who knows what- so they are sure to be big pups. NOTE: They will be available to meet at the PetSmart Adoption Event in Springfield, MO on Saturday, June 20. Come meet them and take one home! If you're interested in adopting me, please fill out an application at www.polkcountyhumanesociety.org/adopt. You can also reserve an appointment to meet me. Some pets are in foster homes or may already have visits scheduled, so appointments help ensure I’ll be available. Polk County Humane Society is located in Bolivar, Missouri, and we welcome adopters from any state. We have access to a transport to Aurora, CO. Other out of state adopters either travel to Missouri or arrange & pay for air transport. Virtual meet and greets are available on the appointment request. ##2755247##

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Related breeds in O Fallon, Missouri

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Mastiff shelters & rescues in O Fallon, Missouri

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

Here are a few organizations closest to you:

Rescue

10.6 miles

Gods Dogs Rescue of TX for St Louis Transport Stop

St Louis, MO 63146

Pet Types: dogs

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Shelter

18.6 miles

Animal Protective Association of Missouri

1705 South Hanley Road, St. Louis, MO 63144

Pet Types: cats, dogs, rabbits, small animals

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Shelter

20.1 miles

Polk County Humane Society - St. Louis Transport

10900 Sunset Hills Plaza, St. Louis, MO 63127

Pet Types: cats, dogs

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Shelter

22.6 miles

Humane Society of Missouri

1201 Macklind Av, St. Louis, MO 63110

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

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Shelter

24.3 miles

CARE STL

2700 Walnut Place, St. Louis, MO 63103

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

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Rescue

24.9 miles

Needy Paws Rescue

St Louis, MO 63125

Pet Types: dogs

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Shelter

32.3 miles

No Time to Spare Animal Rescue and Sanctuary

27933 Pendleton Lost Creek Rd, Warrenton, MO 63383

Pet Types: dogs, farm animals, horses

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Shelter

32.4 miles

Helping Strays of Monroe County

4221 Hanover Rd., Columbia, IL 62236

Pet Types: cats, dogs

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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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