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Mastiff puppies and dogs in Arnold, Missouri

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

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Adopt a Mastiff near you in Arnold, Missouri

We don't see any Mastiffs available for adoption right now, but new adoptable pets are added every day. Try a different search below!

Or, how about these Mastiffs in cities near Arnold, Missouri

These Mastiffs are available for adoption close to Arnold, Missouri.
We'll also keep you updated on Chili Mac's adoption status with email updates.
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Chili Mac

Mastiff

Male, Puppy
St Louis, MO
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Good with dogs, House-trained, Spayed or Neutered, Shots are up-to-date,
Story
Meet Chili Mac!    This 11-month-old Cane Corso is a big, lovable goofball with a heart as giant as his paws! Chili Mac is equal parts cuddle bug and class clown — he’ll make you laugh one minute and melt into your lap the next.   He can be a little shy when meeting new people, but once he decides you’re cool, he’s all in! He’s great with dogs big and small (seriously — from 6 lbs to 120 lbs!), crate and potty trained, and already knows some basic commands.   Due to Chili Mac's size and clumsiness, he would do best in a home with older children. He would also be best with someone who has breed/guardian experience given some mouthy behaviors which are normal for the breed.   Chili Mac would love an active home with another dog friend or a human adventure buddy. Whether you’re hiking, road-tripping, or just lounging on the couch- as long as you don’t mind a little drool, he’s ready to be your ride-or-die!    If interested, please  complete the  Adoption Application  on our website at  www.NeedyPaws.org  and we will contact you.  Adopters must live within an hour’s drive of St. Louis, MO. Our $295 adoption fee includes up-to-date vaccinations, heartworm testing and preventative, spay/neuter and microchip. We are a 100% foster-based rescue and all of our dogs live in approved foster homes. We are dedicated to finding the best Forever Homes, and will perform home visits and conduct veterinarian and reference checks for each potential adopter.Visit this organization's web site to see any additional information available about this pet.November 12, 2025, 2:35 pm
We'll also keep you updated on Birdie's adoption status with email updates.
Photo of Birdie

Birdie

Mastiff

Female, 1 yr 8 mos
Columbia, IL
Size
(when grown) X-Large 101 lbs (46 kg) or more
Details
Good with dogs, Not good with cats, House-trained, Spayed or Neutered, Shots are up-to-date,
Story
This playful girl is the perfect mix of affection and independence! Birdie adores belly rubs, cuddles, and of course, treats! She is very treat motivated which makes training fun and rewarding. She is housebroken and enjoys spending time with her people but she is also independent enough to relax on her own. Birdie knows how to sit and is learning other commands. She is currently working on her leash manners, and still has other basics to refine, but she learns fast and actually enjoys training. Birdie does have a prey drive, so a home without cats or small dogs is going to be the safest fit. And lets be honest — Boerboels are not your casual 'first dog' breed. They are powerful protection dogs by nature and you need to understand what comes with owning a dog like her. The good news? They are phenomenal family companions when they have structure and Birdie has been nothing but gentle and sweet with her entire foster family.If you are experienced with large working breeds and want a smart, loyal, fun dog to add to your family, Birdie is your girl. A local trainer, who is actually her foster parent, is offering free training lessons to whoever adopts her, because we all want to set her and her new family up for success from day one. Birdie is one year old and weighs 112 pounds.The adoption fee for adult dogs, seven months and older, is $250. All pets are microchipped, up to date on vaccines, and will be altered prior to adoption. If you are interested in meeting a dog, please stop by the shelter during open hours. Dogs may be in a foster home, therefore scheduling an appointment is recommended. If you have an existing dog at home, we recommend bringing it along to meet your possible new family member.helpingstrays.org
We'll also keep you updated on WALTER's adoption status with email updates.
Photo of WALTER

WALTER

Mastiff

Male, 7 yrs 1 mo
St. Louis, MO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Spayed or Neutered,
Story
Walter is looking for a home where he can continue to thrive and share his infectious happiness. If you`re ready for a loyal and affectionate companion, Walter is eager to meet you!
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, 8 yrs 1 mo
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 Gus's adoption status with email updates.
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Photo of Gus

Gus

Mastiff Mixed Breed (Large)

Male, Adult
St. Louis, MO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with kids, Good with dogs, House-trained, Spayed or Neutered, Shots are up-to-date,
Story
Meet Gus! Gus is a charming 3-year-old mastiff mix with a heart as big as his paws. This gentle giant is friendly, outgoing, and absolutely loves people. He gets along wonderfully with other dogs and kids—just be prepared for a little “bull in a china shop” energy when he gets excited! Gus is house-trained, kennel-trained, and making great progress with his leash skills. He’s also an excellent car buddy, happy to settle in and enjoy the ride. If you’re looking for a lovable, goofy companion who brings joy wherever he goes, Gus might just be your perfect match! https://www.shelterluv.com/matchme/adopt/NAF/Dog
We'll also keep you updated on Sage's adoption status with email updates.
Photo of Sage

Sage

Mastiff

Female, Adult
Saint Louis, MO
Size
(when grown) Large 61-100 lbs (28-45 kg)
Details
Good with kids, Good with dogs, House-trained, Spayed or Neutered, Shots are up-to-date,
Story
Hi! Sage is what I believe is an iltalian mastiff mix of some sort. Her exact breed is unknown. Her birthday is 2/24/23. She has never resided in a shelter. She was fostered for 2 months through the Stray Reacue, then adopted by me. I am looking to rehome her solely because she is a very social dog who thrives in a home with multiple humans/dogs. Given my sudden life change, I am no longer able to provide that for her. I have noticed her a bit less happy in a home with just myself and her. Please reach out with any additional questions/concerns!

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

Mastiff puppies and dogs in nearby cities

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Related breeds in Arnold, Missouri

Mastiff shelters & rescues in Arnold, Missouri

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

Here are a few organizations closest to you:

Rescue

8.4 miles

Needy Paws Rescue

St Louis, MO 63125

Pet Types: dogs

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Shelter

10.5 miles

Helping Strays of Monroe County

4221 Hanover Rd., Columbia, IL 62236

Pet Types: cats, dogs

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Shelter

13 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

13.8 miles

Is Today My Day Rescue

St. Louis, MO 63139

Pet Types: dogs

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Rescue

14.8 miles

Nala and Friends Dog Rescue - ST. LOUIS transport

St. Louis, MO 63118

Pet Types: dogs

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Shelter

17.2 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

18.5 miles

Gods Dogs Rescue of TX for St Louis Transport Stop

St Louis, MO 63146

Pet Types: dogs

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Shelter

18.5 miles

Humane Society of Missouri - Maryland Heights

11660 Administration Dr., (Page Ave. and Schuetz Road), Maryland Heights, MO 63146

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

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Shelter

22.6 miles

Belleville Area Humane Society

1301 S. 11th St., Belleville, IL 62223

Pet Types: cats, dogs

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Rescue

23.3 miles

Charming Pet Rescue - MO Transport Stop

St. Louis, MO 63303

Pet Types: 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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