Once Upon A Moose (OUM)

Vanessa W.

Breeder of Colorado Mountain Dogs

  • Cotopaxi, CO
  • Responds within a day

Available puppies

Maeve

Ready now

5 months old · Female

Po

Ready now

6 months old · Male

Upcoming litters

Grover
Isla

Expected Colorado Mountain Dog litter

Due Dec. 2025

Ready Feb. 10, 2026

Meet the breeder

I'm Vanessa W., the breeder behind Once Upon A Moose (OUM) located in Cotopaxi, CO. We are committed to always responsibly breeding with the best interest of our puppies’ health and longevity at the forefront. Our breedings are carefully thought out so we are able to match pedigrees, body types, temperaments, and personalities in order to share only well-bred puppies.

Q. & A. with Vanessa

  • Why did you start breeding?

    We never set out to be breeders. However with livestock and young kids, we needed protection from predators. Once we saw these amazing dogs in action we fell hard and fast for them and the vision of what the Colorado Mountain Dog was being developed for.

  • What makes your program special?

    We are dedicated to only breeding the best of the best. Our dogs all go through a rigorous evaluation process that goes on for months. We do genetic health testing to ensure the health of our pups. We have passed on many dogs that are not the perfect fit for our program. Once we have a litter the pups are cared for and handled daily to ensure the bond with humans are developed and nurtured.

  • Where do your breeding dogs live?

    They live in my home and guardian homes.

Matched dogs

These dogs are already reserved or have gone home.

Getting a puppy from Vanessa

Vanessa has been certified by Good Dog’s screening team for responsible and trusted breeding practices. When you’re ready to reach out, feel free to ask any questions about the breed, their program, or specific puppies.

Together, you’ll choose the puppy that’s right for you, stay in touch with regular updates, and plan how to bring your new puppy home.

Price

Puppy prices include a $250 non-refundable deposit and between $700 - $1,000 final payment, before taxes & fees.
Pay over time with Klarna.

“This includes registration with the Colorado Mountain Dog Registry, full dewormings at 2, 4, 6, & 8 weeks, first round of vaccines, and a microchip implant. Deposits start being taken after the litter is on the ground. Choice of pup is based on order of deposits.”

Contract & health guarantee

Vanessa may provide a written contract or health guarantee when you purchase a puppy. This helps protect both you and your breeder, ensuring that you both have a clear understanding of the terms of your puppy purchase. If Vanessa offers a contract or guarantee, the details will be personalized by them. If you have any questions or want to know more, don’t hesitate to reach out to Vanessa directly.

Always communicate and pay on Good Dog.Learn more

What’s included

    • From Good Dog
      • Lifetime support from Good Dog’s Care Team
      • 10% lifetime discount on Figo pet insurance
      • Puppy Training Program & private community
    • Enrichment & socialization
      • Various sounds
      • Surface & tactile stimulation
      • Socialized with children
      • Daily handling
      • Socialized with other dogs
      • Introduced to people of different ages and appearances
      • Socialized with other animals
    • Puppy health practices
      • Vet check
      • First round of shots and deworming
      • Vet records
      • Microchip
    • Extras
      • Food & treats
      • Registration

Location & pick-up

You can drive or fly to pick up your puppy from Vanessa.

Breeder’s location

Meet in Cotopaxi, CO

5140 miles away

·

Other pick-up locations

Meet at Denver Airport

5026 miles away

·

Meet in Colorado Springs, CO

5087 miles away

·

More about Vanessa

  • Club memberships

    Vanessa is a member of Colorado Mountain Dog Registry and American Rare Breed Association .

  • Certifications & recognitions

    Pet Care Program PACFA licensed, American Rare Breed Association .

  • Vanessa has been a member of Good Dog for over 3 years

    Vanessa was screened for responsible practices and has been a member since 2022.

  • Vanessa’s links

Vanessa is a trusted Good Dog breeder

Once Upon A Moose (OUM) meets or exceeds our community standards in these areas:

  • Responsible breeding practices
  • Health of breeding dogs and puppies
  • Puppy environment and enrichment
  • Buyer education and policies

Litter and program updates

Parent dogs

Parent health testing

Breeder-Reported Testing

Excellent level

Once Upon A Moose (OUM) reports to performing the health tests below on their breeding dogs. Ask your breeder about the tests performed on the parents of your litter. Learn more about health testing for Colorado Mountain Dogs.

  • Hip Dysplasia

    Hip testing reduces the chance of passing down hip dysplasia, which is primarily found in large breed dogs and can cause hip pain and the eventual loss of the function of the hip joint.

  • DNA Disease Panel

    Genetic testing reduces the chance of passing down a wide variety of hereditary diseases of differing prevalence and severity such as Progressive Retinal Atrophy (an eye disease) and Von Willebrand's Disease (a blood disease).

Verified owner stories

Hear what other owners say about working with Vanessa to bring home their puppies.

  • Hailey P.

    Verified owner · Feb. 2025

      • +4

    Vanessa was great! She always responded in a timely manner and was very educated and helpful. I loved that she allowed me and my husband to go to the farm so we could pick out the perfect pup for us.

    Hillary C.

    Verified owner · Jan. 2025

      • +7

    We had the best experience with Vanessa!! She was super responsive, helpful, and made the entire process of adopting a new furry member of our family so easy. It was a magical drive in and out of her beautiful farm and simply the best experience. We love our new dog so much and simply can't imagine life without her.

  • Kirsty S.

    Verified owner · Feb. 2025

      • +4

    Vanessa was wonderful to work with! She was extremely helpful and answered my extensive list of questions happily and honestly. Laboon has been such an amazing addition to our family and came home confident, so friendly and exactly the breed standard Vanessa described.

    CH

    Christine H.

    Verified owner · Oct. 2023

    OUM responded quickly to all of my inquiries. Very informative on the CMD breed and our Della is such a delight to have in our home.

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Health testing is one key piece of responsible breeding and is performed on breeding dogs to prevent the presence of heritable conditions in their puppies.

Health testing is one key piece of responsible breeding and is performed on breeding dogs to prevent the presence of heritable conditions in their puppies.

Health testing is one key piece of responsible breeding and is performed on breeding dogs to prevent the presence of heritable conditions in their puppies.

Health testing is one key piece of responsible breeding and is performed on breeding dogs to prevent the presence of heritable conditions in their puppies.

Health testing is one key piece of responsible breeding and is performed on breeding dogs to prevent the presence of heritable conditions in their puppies.

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