Lily’s Second Chance

Senior Mixed Breed dogs in Missouri

Senior Mixed Breed dogs for adoption in Missouri

Meet 38 adoptable senior Mixed Breed dogs (age 7+) in Missouri. Each one is from a shelter or rescue and ready for a calm, loving home.

Older Mixed Breeds in Missouri are often passed over for puppies, yet they're usually house-trained, settled in temperament, and ready to bond right away — and because they're fully grown, you already know their size and personality. Adopting a senior Mixed Breed in Missouri means welcoming a calm, grateful companion who can settle in from day one.

Last updated September 24, 2026 at 4:22 PM EDT. Listings refresh throughout the day. Always confirm a dog’s availability with the shelter or rescue before making plans.

All senior Mixed Breed dogsAll senior dogs in Missouri

Available senior Mixed Breed dogs in Missouri

38 senior Mixed Breed dogs available in Missouri.

10+ years
Photo of Rolex, adoptable senior Mixed Breed (Large) in St. Louis, Missouri

Rolex

Mixed Breed (Large) • Male • 10 years

Neutered · Stranger Danger · The One Love Club · No Cats · No Kids · Single Dog Home · Behavioral Issues - Must Work with Stray Rescue Training · Spec…

Stray Rescue of St. Louis • St. Louis, MO

View profileView Adoption Page ↗ (opens in a new tab)
Senior confirmed
Photo of Elephant, adoptable senior Mixed Breed (Large) in St. Louis, Missouri

Elephant

Mixed Breed (Large) • Female • 9 years

Dog Reactive · Spayed · No Kids · Stranger Danger · Behavioral Issues - Must Work with Stray Rescue Training · Special Needs · The One Love Club

Stray Rescue of St. Louis • St. Louis, MO

View profileView Adoption Page ↗ (opens in a new tab)

Senior Mixed Breed dogs in other states

Texas82New York29Indiana28California23Florida21Maryland17Tennessee12Virginia12Oregon10Georgia8Illinois8North Carolina7

Other senior dogs in Missouri by breed

Pit Bull Terrier9German Shepherd7Labrador Retriever6Beagle4Shih Tzu4Border Collie3Terrier3Australian Cattle Dog2Cavalier King Charles Spaniel2Chihuahua2Great Pyrenees2Mastiff2

Adopting a senior Mixed Breed in Missouri — 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 in Missouri?

Open any dog's profile to see the shelter or rescue caring for them in Missouri, then use the adoption link or contact details to apply directly with that organization. Lily's Second Chance simply gathers senior Mixed Breeds in one place so they're easier to find.

Are there always senior Mixed Breed dogs available in Missouri?

Availability changes often as dogs are adopted and new ones are listed. If you don't see a senior Mixed Breed in Missouri right now, check back soon or browse nearby states — new dogs are added regularly.

Can I adopt a senior Mixed Breed from Missouri if I live elsewhere?

Often, yes. Many rescues and shelters in Missouri arrange or help coordinate transport for the right adopter, while others prefer a local meet-and-greet first. Open a dog's profile and ask the organization directly how their out-of-area adoption process works.

Know a senior Mixed Breed in Missouri who needs a home?

Shelters and rescues can list adoptable senior dogs for free.

Submit a senior dogBrowse resources