Senior Mixed Breed dogs

Senior Mixed Breed dogs for adoption

Meet 235 adoptable senior Mixed Breed dogs (age 7+) from shelters and rescues across the country. Older dogs are often calm, house-trained, and ready to love from day one. Showing 151–180 of 235 below.

Senior Mixed Breeds 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 Mixed Breed 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 Mixed Breed dogs

Senior confirmed
Lion, adoptable senior Husky, Siberian / Mixed Breed (Large) in Henderson, NV

Lion

Husky, Siberian / Mixed Breed (Large) • ♂ Male • 9 years

Lion is a senior male Husky, Siberian / Mixed Breed (Large) located in Henderson, NV. Senior dogs make wonderful companions.

cityofhenderson.com • Henderson, NV

Senior confirmed
Drizzy, adoptable senior Mixed Breed, Large (over 44 lbs fully grown) in Georgetown, TX

Drizzy

Mixed Breed, Large (over 44 lbs fully grown) • ♂ Male • 9 years

Drizzy is a 9-year-old senior male mixed breed (large, over 44 lbs) at Williamson County Regional Animal Shelter in Georgetown, TX. Senior dogs make w…

Williamson County Regional Animal Shelter • Georgetown, TX

10+ years
Pierre, adoptable senior Mixed Breed, Large (over 44 lbs fully grown) in Georgetown, TX

Pierre

Mixed Breed, Large (over 44 lbs fully grown) • ♂ Male • 13 years

Neutered.

Williamson County Regional Animal Shelter • Georgetown, TX

Senior confirmed
She-ra, adoptable senior Mixed Breed, Large (over 44 lbs fully grown) in Georgetown, TX

She-ra

Mixed Breed, Large (over 44 lbs fully grown) • ♀ Female • 8 years

She-Ra may be a little unsure when meeting new people, but it doesn't take long to win her over-especially if you come bearing treats! Once she warms …

Williamson County Regional Animal Shelter • Georgetown, TX

Senior confirmed
Buddy, adoptable senior Mixed Breed, Large (over 44 lbs fully grown) in Georgetown, TX

Buddy

Mixed Breed, Large (over 44 lbs fully grown) • ♂ Male • 8 years

Buddy-the SMILEY guy with a heart as big as his grin. Buddy came to the shelter when his person lost their home, and despite the upheaval, he remains …

Williamson County Regional Animal Shelter • Georgetown, TX

Senior confirmed
Shepard, adoptable senior Mixed Breed, Large (over 44 lbs fully grown) in Georgetown, TX

Shepard

Mixed Breed, Large (over 44 lbs fully grown) • ♂ Male • 7 years

Shepard is looking for a fresh start and a loving place to call home. At 7 years old and 69 pounds, he's the perfect mix of maturity and fun. This han…

Williamson County Regional Animal Shelter • Georgetown, TX

Senior confirmed
Gabby, adoptable senior Mixed Breed, Large (over 44 lbs fully grown) in Georgetown, TX

Gabby

Mixed Breed, Large (over 44 lbs fully grown) • ♀ Female • 7 years

Gabby is a precious 7-year-old girl who is as sweet as she is smart. She is house trained and always excited to head out for a walk, happily exploring…

Williamson County Regional Animal Shelter • Georgetown, TX

Senior confirmed
Abel, adoptable senior Mixed Breed, Large (over 44 lbs fully grown) in Georgetown, TX

Abel

Mixed Breed, Large (over 44 lbs fully grown) • ♂ Male • 7 years

Abel is a lovable goofball. Despite his large size, he can't resist chasing butterflies, bringing a lot of joy and laughter to everyone around him. Hi…

Williamson County Regional Animal Shelter • Georgetown, TX

10+ years
Avander, adoptable senior Mixed Breed, Large (over 44 lbs fully grown) in Georgetown, TX

Avander

Mixed Breed, Large (over 44 lbs fully grown) • ♂ Male • 11 years

Avander is a stunning boy who is searching for his new home. He'd love a person that will give him a bit of time and space to settle into things. He i…

Williamson County Regional Animal Shelter • Georgetown, TX

Senior confirmed
Roxy, adoptable senior Mixed Breed, Large (over 44 lbs fully grown) in Georgetown, TX

Roxy

Mixed Breed, Large (over 44 lbs fully grown) • ♀ Female • 9 years

Meet Roxy! This gorgeous golden girl isn't letting her senior status slow her down-she's still full of energy and ready for fun! With her stunning faw…

Williamson County Regional Animal Shelter • Georgetown, TX

Senior confirmed
Beaux, adoptable senior Mixed Breed, Large (over 44 lbs fully grown) in Georgetown, TX

Beaux

Mixed Breed, Large (over 44 lbs fully grown) • ♂ Male • 7 years

If you're looking for a big, squishy love bug to be your next best friend, Beaux is the one for you! His previous family describes him as a cuddly and…

Williamson County Regional Animal Shelter • Georgetown, TX

Senior confirmed
Atlas, adoptable senior Mixed Breed, Large (over 44 lbs fully grown) in Georgetown, TX

Atlas

Mixed Breed, Large (over 44 lbs fully grown) • ♂ Male • 9 years

Meet Atlas, the charismatic senior heartthrob of the dog world. Independent in the play yard and a pool enthusiast, Atlas knows how to make a splash. …

Williamson County Regional Animal Shelter • Georgetown, TX

Senior confirmed
Jenny, adoptable senior Terrier (Unknown Type, Medium)/Mixed Breed (Medium) in O'Fallon, MO

Jenny

Terrier (Unknown Type, Medium)/Mixed Breed (Medium) • ♀ Female • 8 years

Jenny is a female Terrier (Unknown Type, Medium)/Mixed Breed (Medium), 8 yrs 6 mos (senior), located in O'Fallon, MO at Unleashed Potential Animal Res…

Unleashed Potential Animal Rescue • O'Fallon, MO

10+ years
Dre, adoptable senior American Staffordshire Terrier/Mixed Breed (Large) in O'Fallon, MO

Dre

American Staffordshire Terrier/Mixed Breed (Large) • ♂ Male • 12 years

Dre is a 12 years, 1 month old male American Staffordshire Terrier/mixed breed (large) at Unleashed Potential Animal Rescue in O'Fallon, MO. Senior do…

Unleashed Potential Animal Rescue • O'Fallon, MO

10+ years
Fleetwood, adoptable senior Shepherd, German / Mixed Breed (Medium) in Dallas, TX

Fleetwood

Shepherd, German / Mixed Breed (Medium) • ♂ Male • 10 years

Fleetwood is a senior male Shepherd (German) / mixed-breed, medium-sized, at Dallas Pets Alive in Dallas, TX. Senior dogs make wonderful companions.

Dallas Pets Alive • Dallas, TX

Senior Mixed Breed dogs by state

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Adopting a senior Mixed Breed — 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 Mixed Breed?

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 Mixed Breed dogs a good fit for first-time adopters?

Often, yes. An older Mixed Breed 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 Mixed Breed 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 Mixed Breed?

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 Mixed Breed instead of adopting?

Many shelters and rescues offer a foster program, sometimes with a foster-to-adopt path. Fostering a senior Mixed Breed 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.