Senior confirmed
STITCH
I am heartworm positive but my treatment is included with my adoption fee and will be administered at the shelter!
Grand Prairie Animal Services • Grand Prairie, TX
Senior Mastiff dogs
Senior Mastiff dogs for adoption
Meet 23 adoptable senior Mastiff dogs (age 7+) from shelters and rescues across the country. Older dogs are often calm, house-trained, and ready to love from day one.
Senior Mastiffs are often overlooked in favor of puppies, yet they're frequently house-trained, settled in temperament, and ready to bond immediately. Because they're fully grown, you already know roughly how big they are and what they're like — making an older Mastiff one of the most predictable and rewarding dogs you can welcome home.
Last updated July 12, 2026 at 9:30 AM EDT. Listings refresh automatically, usually every 12 hours.
Available senior Mastiff dogs
Senior confirmed
BENNY
My name is Benny. I am described as a male, tan Mastiff.
Chicago Animal Care and Control • Chicago, IL
Senior confirmed
Ruby
Ruby is a 9-year-old female Mastiff in Bullard, TX. Senior dogs make wonderful companions.
saverockythegreatdane.org • Bullard, TX
Senior confirmed
HAWTHORN
HAWTHORN is a senior male Mastiff at Kern Co Animal Control Dept - Bakersfield in Bakersfield, CA. Senior dogs make wonderful companions.
Kern Co Animal Control Dept - Bakersfield • Bakersfield, CA
Senior confirmed
Moose
Housetrained · Good with Kids · Good with Cats · Good with Dogs
greyfacerescue.org • St. Cloud, MN
10+ years
NATE
NATE is a large male Mastiff listed as a senior at Prince Georges County Animal Management Division in Forestville, MD. Senior dogs make wonderful com…
Prince Georges County Animal Management Division • Forestville, MD
Senior confirmed
Jeffrey
Jeffrey, Mastiff/Shepherd mix, Brindle, Male neutered, 2 years old Jeffrey is a very handsome boy! He may take a little time to warm up, but once he d…
Northern Ocean County Animal Facility • Jackson, NJ
Senior confirmed
BEAR
Bear's 4 Night Safe and Sound Sleepover 5/11-5/15:Bear had a sleepover with us on May 11-15th while construction was being done at the shelter and he …
City of Sacramento Animal Care Services • Sacramento, CA
Senior confirmed
Baloo
HI, I'M BALOO! I LOVE KIDS AND OTHER DOGS. IF YOU'D LIKE TO ADOPT ME, PLEASE FILL OUT THE APPLICATION AT WWW.BARKVILLEDOGRESCUE.ORG/APPLICATIONS OR SE…
Barkville Dog Rescue • Roswell, GA
Senior confirmed
GERALDINE
GERALDINE is a senior female Mastiff of medium size at Summit County Animal Control in Akron, OH. Senior dogs make wonderful companions.
Summit County Animal Control • Akron, OH
10+ years
Dudley-Special Needs - Adopt Me!
He might not hear you, he may not see you, he may be missing all his teeth… but Dudley is single and ready to mingle Our sweet, special boy Dudley is …
The Little Red Dog, Inc • Lake Forest, CA
Senior confirmed
Senior confirmed
HERCULES
HERCULES is a large male Mastiff senior currently at Miami Dade Animal Services in Miami, FL. Senior dogs make wonderful companions.
Miami Dade Animal Services • Miami, FL
Senior confirmed
ROSCOE
Roscoe (A567045) is a 7-year-old senior with the sweetest, most gentle soul. He has a calm, quiet demeanor and seems very well-mannered. As soon as we…
Prince Georges County Animal Management Division • Forestville, MD
Senior confirmed
Bob
Welcome Bob to CCPAL Rescue. He is a 7.5-year-old Mastiff/Lab mixed dog. He is about 50 pounds and he is very sweet. He is now ready for his forever h…
Cowboy Capital Pet Assistance League • Bandera, TX
Senior confirmed
FOXY
FOXY is a senior female Mastiff at Cumberland County Animal Control in Fayetteville, NC. Senior dogs make wonderful companions.
Cumberland County Animal Control • Fayetteville, NC
Senior confirmed
GUEVITO
GUEVITO is a senior male Mastiff at Miami Dade Animal Services in Miami, FL. Senior dogs make wonderful companions.
Miami Dade Animal Services • Miami, FL
10+ years
Senior confirmed
Dusty
Dusty is a senior male Mastiff (X-Large) at Mastiff Rescue Oregon in McMinnville, OR. Senior dogs make wonderful companions.
Mastiff Rescue Oregon • McMinnville, OR
Senior confirmed
Christina (bonded with Duke) (foster needed)
Christina is a 7 years 1 month old senior female Mastiff from Vail, AZ, currently with The Big Mutt Network. She is bonded with Duke and needs a foste…
The Big Mutt Network • Vail, AZ
Senior confirmed
JERSEY
JERSEY is a male Mastiff, a large senior dog located in Green Cove Springs, FL at Clay County Animal Care and Control. Senior dogs make wonderful comp…
Clay County Animal Care and Control • Green Cove Springs, FL
Senior confirmed
Duke (bonded with Christina) (foster needed)
Duke is an 8 years 1 month old male Mastiff at The Big Mutt Network in Vail, AZ. He is bonded with Christina and needs a foster. Senior dogs make wond…
The Big Mutt Network • Vail, AZ
Senior confirmed
Sully
Sully is an 8 years 1 month old male Mastiff/Boxer located at the Animal Rescue Fund of MS in Jackson, MS. Senior dogs make wonderful companions.
Animal Rescue Fund of MS • Jackson, MS
Senior Mastiff dogs by state
Other breeds
Adopting a senior Mastiff — FAQ
What counts as a senior dog?
Most shelters and vets consider a dog "senior" around age 7, though large breeds often age sooner and small breeds a little later. Every dog listed here is 7 years or older.
How do I adopt a senior Mastiff?
Open a dog's profile to see the shelter or rescue caring for them, then follow the adoption link or contact details to apply directly with that organization.
Are senior Mastiff dogs a good fit for first-time adopters?
Often, yes. An older Mastiff is usually past the high-energy puppy stage and may already know basic commands, which can make ownership easier to ease into. Each profile and shelter can tell you about that dog's individual personality and needs.
Why adopt a senior dog instead of a puppy?
Senior dogs are calmer, usually house-trained, and let you skip the chewing and sleepless nights — and because they are the hardest to place, adopting one can quite literally save a life that might otherwise run out of time.
Are senior Mastiff dogs good with children or other pets?
It depends on the individual dog more than the breed alone. Each dog's profile and the shelter or rescue caring for them can tell you about their history with kids, cats, or other dogs. Senior dogs are often calmer and more predictable than puppies, which can make reading compatibility easier before you commit.
How much does it cost to adopt a senior Mastiff?
Adoption fees vary by shelter and rescue, but senior dogs are frequently discounted or even sponsored — because they wait the longest, many organizations offer reduced fees or cover initial vet care. Open a dog's profile and ask the organization directly for their current fee and what it includes.
Can I foster a senior Mastiff instead of adopting?
Many shelters and rescues offer a foster program, sometimes with a foster-to-adopt path. Fostering a senior Mastiff gets them out of a kennel and into a calm home — which is especially beneficial for older dogs who find shelter life stressful. Ask the organization on any dog's profile whether fostering is an option.
Know a senior dog who needs a home?
Shelters and rescues can list adoptable senior dogs for free.