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Mastiff puppies and dogs in Saint Peters, Missouri

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

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Adopt a Mastiff near you in Saint Peters, Missouri

These Mastiffs are available in Saint Peters, Missouri.
We'll also keep you updated on Daisy's adoption status with email updates.
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Daisy

Mastiff Terrier (Unknown Type, Medium)

Female, Young
St. Louis, MO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with dogs, House-trained, Spayed or Neutered, Shots are up-to-date,
Story
Meet Daisy!Daisy is a 1-year-old, 65-pound Mastiff mix with a heart as big as her paws! Rescued as a stray in poor condition, Daisy has been thriving in her foster home and steadily gaining weight. She’s blossomed into a sweet, loving girl who adores bedtime cuddles and following her humans everywhere—they’ll never be alone with her around!Still a playful pup, Daisy has plenty of energy and is house trained and still learning the ropes of training like not jumping on you in excitement. She’s a smart cookie and eager to please, so with patience and consistency, she’ll become an amazing companion. Daisy loves playing with bigger, higher-energy dogs, like her foster family’s huskies, and has shown promise around cats. While she’s still learning to respect feline boundaries, she’s making great progress.Watching Daisy discover toys and grow into her happy, playful self is nothing short of heartwarming. She’s ready to bring her big heart and loyal spirit into a forever home that will love her unconditionally. Could Daisy be your perfect match?IMPORTANT: Please read all below, especially if you live outside of Texas, which is where our rescue is located.Apply to adopt on our website: https://www.charmingpetrescue.org/adoptAll of our animals are spayed/neutered, microchipped, and up to date on shots.ALL of our animals are located in Boerne, TX, but transport after adoption is available to other states for a $300 fee for dogs or an additional fee varying by location for cats. If you are seeing our pets posted in your state, that's because you live near a transport stop, they are not currently at that location. Petfinder lists our pets as 'Out of Town' pets at other locations, and Adopt-a-Pet lists our location as a Transport stop. Those are currently the only options they offer to make this clear, so we put this description we've put at the bottom to explain it. You can read more about transport here: www.charmingpetrescue.org/transportWe understand transport is not an option for everyone, but we offer it at the cost we pay the transport company for those who wish to adopt from us.February 6, 2025, 10:16 pm

Or, how about these Mastiffs in cities near Saint Peters, Missouri

These Mastiffs are available for adoption close to Saint Peters, Missouri.
We'll also keep you updated on Millie's adoption status with email updates.
Photo of Millie

Millie

Mastiff Labrador Retriever

Female, Adult
Wentzville, MO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with kids, Good with dogs, Good with cats, Needs experienced adopter, House-trained, Spayed or Neutered,
Story
Millie is a 4 year old mastiff/lab mix dog, she is very sweet knows basic commands of sit, lay down, and is kennel trained. We are rehoming due to my children's medical complexities that has made it impossible to care for her like she deserves. She is good around dogs, cats and children. She will come with her kennel, beds, her harnesses, collars, etc.
We'll also keep you updated on BRYNN's adoption status with email updates.
Photo of BRYNN

BRYNN

Mastiff

Female, 4 mos
St. Louis, MO
Size
(when grown) Small 25 lbs (11 kg) or less
Details
Spayed or Neutered,
Story
Brynn is a fun-loving and active dog who’s always up for an adventure! Social and friendly, he loves being around people and exploring new places. His energetic personality makes him the perfect companion for an active home. Come meer her today!
We'll also keep you updated on Bellatrix aka "Willow Eliza"'s adoption status with email updates.
Photo of Bellatrix aka "Willow Eliza"

Bellatrix aka "Willow Eliza"

Mastiff

Female, 7 yrs 4 mos
St. Louis, MO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Spayed or Neutered,
Story
Bella is big and beautiful with a personality to match. This six-year-old mastiff mix girl adores people, snuggles, pets, and attention. She is spayed and up-to-date on all her medical care and is heartworm-negative. Bella is a big girl, approximately 65 pounds, so while she is very good with people, she would be best with older kids who can keep up with her size. She is house-trained, and a fenced yard would be best since Bella is a large dog and likes to play. Bella likes her people so much she doesn't want to share and would do best as the only dog in her home. To meet Bella, visit istodaymydayrescue.org to fill out an application. Her adoption fee is $100.
We'll also keep you updated on Finrir's adoption status with email updates.
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Photo of Finrir

Finrir

Mastiff Mixed Breed (Medium)

Male, 4 yrs 9 mos
St. Louis, MO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Spayed or Neutered,
Story
Meet Finrir (Finn)! Finrir, affectionately known as Finn, is ready to charm his way into your heart and home! About Finn: Finn is an 85 lb Mastiff mix with a heart as big as his size. He's a gentle giant who thrives on one-on-one attention and would love to be the center of your universe! Despite his size, Finn is a total softie. He's non-destructive and a pro at taking his medicine with ease. While Finn prefers to be the only fur baby in the house due to some dog reactivity, he'll fill your home with enough love to make up for it! What Finn Needs: A loving family who understands his need to be the only pet. Plenty of space for him to stretch out and relax. Someone who enjoys leisurely strolls because Finn walks like a true gentleman on the leash! Interested in Adopting? If you're ready to give Finn the forever home he deserves, reach out to Center for Animal Rescue and Enrichment of St. Louis - CARE STL Let's find this big guy his perfect match! Help spread the word by sharing this post with friends and family. Together, we can help Finn find his happily ever after! #AdoptDontShop #FosterDog
We'll also keep you updated on Rutt's adoption status with email updates.
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Photo of Rutt

Rutt

Mastiff

Male, 4 yrs 8 mos
St. Louis, MO
Size
(when grown) -
Details
Spayed or Neutered,
Story
Hello, My name is Rutt but I will respond to almost anything if you say it nicely. I'm a 4 year old Mastiff mix that enjoys watching TV on the couch and mouthing material. I'm gentle when playing with humans, but have had a bad experience with a small dog and may not do well in homes with small animals. I am a stubborn speedbump that will follow you around to ensure you are not lonely. I am crate and potty trained. I do not like to get in the car, go on long walks, or get into high beds but that just means more times for cuddles on the couch. I may look intimidating but don't let looks fool you, I run from ballons and empty cups. I got my nails done today and the groomer raved about my good behavior. If you want to see if I'm a good fit, please reach out to Care. Love Rutt
We'll also keep you updated on Mikey Boy's adoption status with email updates.
Photo of Mikey Boy

Mikey Boy

Mastiff American Staffordshire Terrier

Male, 2 yrs 2 mos
St. Louis, MO
Size
(when grown) -
Details
Spayed or Neutered,
Story
-

These pups are in Saint Peters, Missouri too!

Below are our newest added Mastiffs available for adoption in Saint Peters, Missouri. To see more adoptable Mastiffs in Saint Peters, Missouri, use the search tool below to enter specific criteria!
We'll also keep you updated on Hagrid's adoption status with email updates.
Photo of Hagrid

Hagrid

St. Bernard Great Pyrenees

Male, Adult
St. Louis, MO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with dogs, Spayed or Neutered, Shots are up-to-date,
Story
Meet Hagrid! Hagrid is a big ol’ sweetheart and a true gentle giant at 100 pounds of love and sloppy kisses. With his mild and laid-back nature, he’s the perfect companion for someone who appreciates a calm and loving dog. He’s about 5 years old and a Great Pyrenees/lab mix. His foster got his dna test done!This big boy enjoys following his favorite person around and being part of your day-to-day life. Hagrid seems to get along well with other dogs, but may be better suited as a loyal solo companion. Hagrid needs a loving family that is willing to provide additional care for him in the future if need be. He has been diagnosed with a MRSP skin infection that may require ongoing care and medication throughout his life to keep him itch free and comfortable. Although MRSP can be treated and cured, there is also a possibility that ongoing treatment may be required. Hagrid is currently responding to his treatment and is a happy, go lucky boy! Are you ready to welcome this big bundle of love into your family and give him the extra care down the road if he needs it?IMPORTANT: Please read all below, especially if you live outside of Texas, which is where our rescue is located.Apply to adopt on our website: https://www.charmingpetrescue.org/adoptAll of our animals are spayed/neutered, microchipped, and up to date on shots.ALL of our animals are located in Boerne, TX, but transport after adoption is available to other states for a $300 fee for dogs or an additional fee varying by location for cats. If you are seeing our pets posted in your state, that's because you live near a transport stop, they are not currently at that location. Petfinder lists our pets as 'Out of Town' pets at other locations, and Adopt-a-Pet lists our location as a Transport stop. Those are currently the only options they offer to make this clear, so we put this description we've put at the bottom to explain it. You can read more about transport here: www.charmingpetrescue.org/transportWe understand transport is not an option for everyone, but we offer it at the cost we pay the transport company for those who wish to adopt from us.March 3, 2025, 11:06 am
We'll also keep you updated on Boots's adoption status with email updates.
Photo of Boots

Boots

St. Bernard Labrador Retriever

Female, 7 yrs
St. Charles, MO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Spayed or Neutered,
Story
Meet Boots, a sweet and cuddly 7-year-old pup who's ready to be your best friend! 🐾 Boots was surrendered by her previous owners when they could no longer care for her, but she's still full of love and ready to start a new adventure with a family who can give her the attention she deserves. Boots is a total lovebug when it comes to humans—she’s all about snuggles and cuddles! 🌟 She might not be too fond of other dogs at the moment, but with her gentle heart, we think she could learn to share the love over time. As for cats and kids, we're not entirely sure, but considering how snuggly she is, we have a feeling she’d enjoy their company too! Just like Dora and Boots on their adventures, Boots is ready to explore her new life with you by her side. If you're looking for a loyal, loving companion to share your days with, this little explorer is ready to be your new best friend. 🌼 Let’s help Boots find her "map" to a forever home! 🗺️✨

Search for a Mastiff puppy or dog

Use the search tool below to browse adoptable Mastiff puppies and adults Mastiff in Saint Peters, Missouri.

Mastiff puppies and dogs in nearby cities

Related breeds in Saint Peters, Missouri

Mastiff shelters & rescues in Saint Peters, Missouri

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

Here are a few organizations closest to you:

Rescue

5 miles

Charming Pet Rescue - MO Transport Stop

St. Louis, MO 63303

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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Rescue

21.4 miles

Is Today My Day Rescue

St. Louis, MO 63139

Pet Types: dogs

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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

28.9 miles

Gateway Pet Guardians

725 N 15th St, East ST Louis, IL 62205

Pet Types: cats, dogs

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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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