



Yellow Collar
4 weeks old · Female
Rose Collar
4 weeks old · Female
Red Collar
4 weeks old · Female
I'm Mary G., the breeder behind Corazon de Leon Leonbergers located in Perry County, PA. My focus is on excellence in every aspect of my breeding program. I offer top-quality puppies for loving family homes. I am purposeful in everything that I do regarding my dogs, which includes careful selection of breeding dogs and extensive health testing. My goal is to produce healthy dogs with great temperaments that are exemplary representations of the breed.
Why did you start breeding?
What makes your program special?
What are the different breed coat colors in your program?
Where do your breeding dogs live?
These dogs are already reserved or have gone home.
Navy Collar
Male
Orange collar
Male
White Collar
Female
Rust Collar
Male
Teal Collar
Male
Neon Collar
Male
Girl 4
Female
Girl 3
Female
Girl 2
Female
Girl 1
Female
Boy 3
Male
Boy 2
Male
Boy 1
Male
Girl 5
Female
Girl 2
Female
Girl 1
Female
Girl 3
Female
Boy 6
Male
Girl 4
Female
Boy 5
Male
Boy 3
Male
Boy 2
Male
Boy 1
Male
Boy 4
Male
Boy 2
Male
Boy 1
Male
Girl 3
Female
Girl 2
Female
Girl 1
Female
Mary has been certified by Good Dog’s screening team for responsible and trusted breeding practices. When you’re ready, reach out to ask about the puppies or anything else on your mind. You’ll get to know each other through messaging, phone, or video and pay securely, all on Good Dog.
After buyers complete the application and screening process, Mary partners with them to find the best puppy match.
“We take great care in placing each puppy with the right family. Puppies are matched once they're old enough for us to evaluate their temperaments and personalities - typically around 7 weeks.”

“The price includes AKC registration, microchip, one set of puppy vaccinations and appropriate worming. Rear dew claws will be removed if they have them. All puppies are the same price regardless of sex or show quality. I don't take deposits until the litter is at least 3 days old so I'll know the number of each sex I have and the deposits are due when the litter is 3 weeks old. If I don't have a puppy that will fit your home then you'll get a refund.”
Mary 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 Mary 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 Mary directly.
When you pay and communicate on Good Dog, you’re covered by Payment Protection.
You can drive or fly to pick up your puppy from Mary.
Meet in Perry County, PA
3990 miles away
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Club memberships
Mary is a member of Leonberger Club of America.
Mary has been a member of Good Dog for over 5 years
Mary was screened for responsible practices and has been a member since 2021.

Corazon de Leon Leonbergers meets or exceeds our community standards in these areas:
Leonberger
About Moira
Moira is a high energy girl that didn't start to slow down until she was almost 4, I swear she is a golden retriever in a Leo costume! Moria loves to work, she enjoys doing rally & obedience. Moira is one of the rare Leos that retrieves. She's always up for a walk or a swim or just hanging out on the couch with her human Grandma.
Excellent health testing
Excellent level
Corazon de Leon Leonbergers 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 Leonbergers.
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.
Elbow Dysplasia Finals (OFA, BVA, SV, FCI)
Elbow testing reduces the chance of passing down elbow dysplasia, which is primarily found in large breed dogs and can cause arthritis in the elbow joint and front leg lameness.
Eye Certification (CAER, registered with OFA)
Eye testing reduces the chance of passing down a wide range of hereditary eye illnesses including retinal dysplasia, lens luxation, and glaucoma, which can cause impared vision or blindness.
Cardiac Evaluation (registered with OFA)
Heart testing reduces the chance of passing down congenital heart disease, which can cause a range of symptoms ranging from trouble exercising to heart failure.
Thyroid (Autoimmune Thyroiditis, registered with OFA), Polyneuropathy 3, Leonberger and Saint Bernard Type
A breeder may perform additional tests on their dogs that do not fall into these general categories. These tests may be more uncommon or very specific to a particular breed.
Leukoencephalomyelopathy (LEMP), Polyneuropathy 2, Leonberger and Saint Bernard Type, Polyneuropathy 1, Leonberger and Saint Bernard Type
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).
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.