Senior confirmed
Mouse
Mouse is a gentle soul who loves to be with his people, loves walks and even gets the zoomies! He has been known to chase cats so he may do best in a …
Denver Animal Shelter • Denver, CO
Senior dogs in Colorado
Senior dogs for adoption in Colorado
Meet 166 adoptable senior dogs (age 7+) in Colorado. Each one is from a shelter or rescue and ready to give an older dog's quiet, grateful love. Showing 61–90 of 166 below.
Last updated November 9, 2026 at 1:47 AM EST. Listings refresh throughout the day. Always confirm a dog’s availability with the shelter or rescue before making plans.
Senior dogs — age 7 and up — wait far longer for homes than puppies, even though they're usually already house-trained, past the chewing stage, and happy to nap at your feet. Adopting an older dog in Colorado means you typically know their size, temperament, and energy level from day one: fewer surprises, and a grateful companion who settles in fast. Right now the senior dogs listed in Colorado include Pit Bull Terrier, Chihuahua, and Australian Cattle Dog, spread across 19 cities and 32 shelters and rescues. Always confirm availability and adoption requirements directly with the shelter or rescue.
32 shelters and rescues in Colorado currently list senior dogs on Lily's Second Chance.
How adoption works in Colorado
In Colorado, rescue groups post most of the listings, and the majority come from around Denver, Pueblo and Fort Collins. A rescue adoption usually begins with an application and a conversation, and the dog is often living in a foster home. Municipal shelters and humane societies list here as well, generally with walk-in hours.
Open the profile of a dog you are curious about and contact the organization that has it. Plan on an application or a conversation, then a meet and greet, and an adoption fee decided by that organization, which often covers spay or neuter and vaccinations. With listings centered on a few cities, many groups help arrange transport within the state. Check the organization on the dog's profile for that dog's history, requirements and availability.
Available senior dogs in Colorado
166 senior dogs available in Colorado.
10+ years
Liv
Meet Liv! Liv is a 10-year-old Australian Cattle Dog/Blue Heeler — but don't let that number fool you for a second. She plays just as hard as Marlee, …
Evergreen Animal Protective League • Evergreen, CO
Senior confirmed
Agnes
Hello! My name is Agnes and I am a sweet girl looking for a home. I love going for walks and meeting new friends! Come and meet me today!
Larimer Humane Society • Fort Collins, CO
Senior confirmed
Gus
Gus is a big softy who is is ready to trade farm life for his furever home. While Gus is always looking for his next adventure, he’s also accustomed t…
Denver Animal Shelter • Denver, CO
Senior confirmed
Nala
Hey, my name is Nala! I am a friendly and energetic pup who is looking for a new home. I love to play fetch and go on walks. I can't wait to meet you …
Larimer Humane Society • Fort Collins, CO
Senior confirmed
Shadow Fax
Hi, I'm Shadow Fax! I am a sweet little pup looking for a new home. I came into the shelter with my friend Gandy Dancer and would love to be adopted w…
Larimer Humane Society • Fort Collins, CO
Senior confirmed
Senior confirmed
Rogue Wave
Rogue wave is a sweet, fluffy little one with a heart of gold! come down to meet this perfect pup today!
Denver Animal Shelter • Denver, CO
Senior confirmed
Kylie
Meet Kylie! Kylie is a 7 year old cattle dog looking for a new home. She has lots of energy and loves to be the center of attention! She can do well w…
Until They're Home • Fort Collins, CO
10+ years
Hopper
This darling lady is Hopper! She is shy at first but warms up quickly with some patience and love. Once she's comfortable she'll be your new shadow!
Denver Animal Shelter • Denver, CO
10+ years
Tyche
Meet Tyche, a delightful senior dog who is ready to steal your heart! At 10 years old, she brings a wealth of love and loyalty, and she’s looking for …
Until They're Home • Fort Collins, CO
10+ years
Sassy #7
Animal Rescue of the Rockies believes every pet should find a wonderful and caring home. To ensure Sassy #7 finds the best possible home, we ask you f…
Animal Rescue of the Rockies • Aurora, CO
Senior confirmed
Averi
My name is Averi and I am an independent girl. I like to spend my days being lazy on the couch in and out of naps or sun bathe outside protecting my h…
Until They're Home • Fort Collins, CO
Senior confirmed
Left Eye #1
Animal Rescue of the Rockies believes every pet should find a wonderful and caring home. To ensure Left Eye finds the best possible home, we ask you f…
Animal Rescue of the Rockies • Aurora, CO
Senior confirmed
Pops #1
Animal Rescue of the Rockies believes every pet should find a wonderful and caring home. To ensure Pops finds the best possible home, we ask you fill …
Animal Rescue of the Rockies • Aurora, CO
Senior confirmed
Senior confirmed
Senior confirmed
Lola
All people inquiring about pets listed as Courtesy Listings on the EAPL website and/or EAPL posting adoption boards should contact the current pet own…
Evergreen Animal Protective League • Evergreen, CO
10+ years
Kuzco
Meet Kuzco! This sweet, senior beagle is looking for his forever home! He is a nervous, gentle soul who loves snuggles once he gets to know you!
Until They're Home • Fort Collins, CO
Senior confirmed
Carina
Carina is a beautiful girl inside and out! She’s incredibly sweet, extremely well-mannered, and always ready to soak up pets—her soft velvet coat is i…
Dumb Friends League • Denver, CO
10+ years
Meeka
Hi, I am Meeka. I am a super sweet and gentle older lady looking for a home. I like to cuddle, play and make friends. I have a good history with kids,…
Larimer Humane Society • Fort Collins, CO
Senior confirmed
Fred
Hi, I'm Fred! I'm a fun older guy who loves going on walks, playing with toys and meeting new people. I get jumpy and love to give kisses when excited…
Larimer Humane Society • Fort Collins, CO
10+ years
Chloe
Hi, I'm Chloe! I am a fluffy and friendly pup looking for a new home. I can be fearful when meeting new people and in new situations, so I need to fin…
Larimer Humane Society • Fort Collins, CO
Senior confirmed
Carmelo
Carmelo is a sweet, easygoing guy with a silly side and a playful spirit! He loves pets, scritches all over -- especially on his fanny, cuddles, and w…
Dumb Friends League • Denver, CO
Senior confirmed
Charlie
Hi, I'm Charlie! I am a sweet little dog who needs a new home. I am a little shy at first, but I warm up quickly. I would likely do best in a quiet ho…
Larimer Humane Society • Fort Collins, CO
Senior confirmed
Daryl
Meet Daryl! He is a 9 year old Plott Hound mix looking for a new home to spend his golden years. He is a bonded pair with Jesse. Daryl is a sweet boy …
Until They're Home • Fort Collins, CO
10+ years
Leizo
Say Hello to Leizo. He's a senior guy with a teenaged spirit. He's fun and gets excited when he sees the leash because he's always up for a walk. We r…
Dumb Friends League • Denver, CO
Senior confirmed
Toast
Hello! I am Toast! I am a sweet but fearful dog looking for my new home. I would love a quiet home without kids under the age of 12. Even though I am …
Larimer Humane Society • Fort Collins, CO
Senior confirmed
Austin
Hi, we are Terri and Austin! We are a cute bonded pair of pups in need of a new home. We like to cuddle and play with squeaky toys. We can be a little…
Larimer Humane Society • Fort Collins, CO
Senior confirmed
Leela
Meet Leela! She is 8 years old and 66 pounds. Leela is a lovely lady that is ready for her forever home! She likes to greet you by grabbing one of her…
Until They're Home • Fort Collins, CO
Senior dogs in Colorado by breed
Senior dogs in Colorado by city
Shelters & rescues with senior dogs in Colorado
These organizations currently have at least one adoptable senior dog listed on Lily's Second Chance.
- Larimer Humane Society (opens in a new tab) — Fort Collins, Colorado · See Larimer Humane Society’s senior dogs on Lily's Second Chance
- National Mill Dog Rescue (opens in a new tab) — Peyton, Colorado · See National Mill Dog Rescue’s senior dogs on Lily's Second Chance
- Denver Animal Shelter (opens in a new tab) — Denver, Colorado · See Denver Animal Shelter’s senior dogs on Lily's Second Chance
- Until They're Home (opens in a new tab) — Fort Collins, Colorado · See Until They're Home’s senior dogs on Lily's Second Chance
- Adams County Animal Shelter (opens in a new tab) — Brighton, Colorado · See Adams County Animal Shelter’s senior dogs on Lily's Second Chance
- Dumb Friends League (opens in a new tab) — Denver, Colorado · See Dumb Friends League’s senior dogs on Lily's Second Chance
- Riverdale Animal Shelter (opens in a new tab) — Brighton, Colorado · See Riverdale Animal Shelter’s senior dogs on Lily's Second Chance
- Humane Society of the Pikes Peak Region — Pueblo (opens in a new tab) — Pueblo, Colorado · See Humane Society of the Pikes Peak Region — Pueblo’s senior dogs on Lily's Second Chance
- Animal Rescue of the Rockies (opens in a new tab) — Aurora, Colorado · See Animal Rescue of the Rockies’s senior dogs on Lily's Second Chance
- Evergreen Animal Protective League (opens in a new tab) — Evergreen, Colorado · See Evergreen Animal Protective League’s senior dogs on Lily's Second Chance
- Humane Society of the Pikes Peak - Colorado Springs — Colorado Springs, Colorado · See Humane Society of the Pikes Peak - Colorado Springs’s senior dogs on Lily's Second Chance
- Ace of Hearts Dog Rescue - CO (opens in a new tab) — Boulder, Colorado · See Ace of Hearts Dog Rescue - CO’s senior dogs on Lily's Second Chance
- Aurora Animal Care (opens in a new tab) — Aurora, Colorado · See Aurora Animal Care’s senior dogs on Lily's Second Chance
- Aurora Animal Shelter (opens in a new tab) — Aurora, Colorado · See Aurora Animal Shelter’s senior dogs on Lily's Second Chance
- Colorado Animal Rescue (opens in a new tab) — Glenwood Springs, Colorado · See Colorado Animal Rescue’s senior dogs on Lily's Second Chance
- The Good Life Dog Rescue - Denver — Highlands Ranch, Colorado · See The Good Life Dog Rescue - Denver’s senior dogs on Lily's Second Chance
- Summit County Animal Control and Shelter (opens in a new tab) — Frisco, Colorado · See Summit County Animal Control and Shelter’s senior dogs on Lily's Second Chance
- Colorado Puppy Rescue (opens in a new tab) — Parker, Colorado · See Colorado Puppy Rescue’s senior dogs on Lily's Second Chance
- Golden Growls Senior Rescue (opens in a new tab) — Loveland, Colorado · See Golden Growls Senior Rescue’s senior dogs on Lily's Second Chance
- NOCO Humane Larimer Campus (opens in a new tab) — Loveland, Colorado · See NOCO Humane Larimer Campus’s senior dogs on Lily's Second Chance
- Old Soul Canine Rescue (opens in a new tab) — Nederland, Colorado · See Old Soul Canine Rescue’s senior dogs on Lily's Second Chance
- Summit County Animal Control — Frisco, Colorado · See Summit County Animal Control’s senior dogs on Lily's Second Chance
- White Rose Sanctuary (opens in a new tab) — Colorado Springs, Colorado · See White Rose Sanctuary’s senior dogs on Lily's Second Chance
- Animal Aid Brigade - Colorado — Denver, Colorado · See Animal Aid Brigade - Colorado’s senior dogs on Lily's Second Chance
Low-cost spay, neuter and vet care in Colorado
Programs that help Colorado adopters keep a dog healthy on a budget. Each page was checked on 2026-09-10; confirm current hours and eligibility with the organization.
- Spay / neuterHumane Colorado Spay/Neuter Clinic (opens in a new tab) — Affordable spay and neuter surgery for owned cats and dogs at the Denver veterinary hospital at CSU Spur.
- Low-cost vet careHumane Colorado Community Veterinary Services (opens in a new tab) — Denver hospital offering urgent care, surgery, dental care, wellness clinics and affordable vaccinations.
- Spay / neuterHumane Society of the Pikes Peak Region Colorado Springs Spay and Neuter Services (opens in a new tab) — Low cost spay and neuter packages for cats and dogs at the Colorado Springs clinic, booked online.
- Spay / neuterHumane Society of Boulder Valley Spay and Neuter Information (opens in a new tab) — Spay and neuter surgery for dogs, cats and small animals with discounts for income qualified local families.
- Low-cost vet careHumane Society of the Pikes Peak Region Veterinary Services (opens in a new tab) — Wellness exams, vaccinations and a mobile clinic from Colorado Springs and Pueblo shelter clinics.
Senior dogs in other states
Adopting a senior dog in Colorado — 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 dog in Colorado?
Open any dog's profile to see which shelter or rescue is caring for them, then use the adoption link or contact details to apply directly with that organization. Lily's Second Chance gathers senior dogs in one place so they're easier to find — the adoption itself happens through the local group.
How much does it cost to adopt a senior dog in Colorado?
Adoption fees vary by organization, but senior dogs are frequently discounted or sponsored because they wait the longest. Many rescues also begin any needed medical care before adoption. The dog's profile or the shelter can confirm the current fee.
Are senior dogs harder to care for?
Usually not. Older dogs are typically calmer and already trained, which makes the first weeks far easier than with a puppy. Some have age-related needs like a special diet or joint support, and the listing or shelter will tell you what to expect.
Can I adopt a senior dog from another city in Colorado?
Yes. Most shelters and rescues in Colorado welcome adopters from anywhere in the state, and some can arrange transport within Colorado for the right match. Open a dog's profile to see the organization's contact details and ask them directly how their process works.
What should I expect in the first weeks after adopting a senior dog in Colorado?
Senior dogs usually settle in faster than puppies because they're already past the most demanding stage. Expect a brief adjustment period — they may be shy at first, then relax into their personality. A consistent routine, a comfortable spot to rest, and patience are usually all it takes.
Can I foster a senior dog in Colorado instead of adopting?
Many shelters and rescues in Colorado offer foster programs — sometimes with a foster-to-adopt path so you can try the match before committing. Fostering is especially valuable for senior dogs because it gets them out of a kennel and into a calm home while they wait for their forever family. Ask the organization on any dog's profile whether fostering is available.
Are senior dogs good with children or other pets in a Colorado home?
Many senior dogs are calm, gentle, and well-suited to family life — but it depends on the individual dog more than anything else. The shelter or rescue caring for each dog can tell you their specific history with children, cats, and other dogs before you apply. Many organizations offer meet-and-greets to make sure the match is right for everyone.
Guides to help you decide
Getting started
Why Adopt a Senior Dog? 7 Reasons Older Dogs Make Wonderful Companions
Senior dogs are often calm, house-trained, and overlooked at shelters. Here are seven honest reasons an older dog may be the best companion you ever bring home.
6 min readUnderstanding ageHow Old Is a "Senior" Dog? Senior Age by Breed and Size
A dog is not "old" at the same age across the board — size and breed change everything. Here is how to tell when a dog becomes a senior, and what it means for care.
5 min readCare & healthCaring for a Senior Dog: Health, Diet, and Everyday Comfort
How to keep an older dog healthy and comfortable — vet care, senior-appropriate diet, joint and dental health, exercise, and simple home adjustments that make a big difference.
8 min readKnow a senior dog in Colorado who needs a home?
Shelters and rescues can list adoptable senior dogs for free.