


I'm Jon C., the breeder behind Obsidian Giant Tibetan Mastiffs located in New Hampshire. Our mission is to improve the breed through selective breeding and ample health testing. We believe that with the collective efforts of other responsible breeders, we can improve the future of the breed.
Where do your breeding dogs live?
These dogs are already reserved or have gone home.
Boy 4
Male
Girl 1
Female
Boy 3
Male
Boy 1
Male
Boy 2
Male
Girl 3
Female
Girl 2
Female
Girl 4
Female
Girl 5
Female
Girl 6
Female
Jon 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.
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.

Jon 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 Jon 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 Jon 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 Jon.
Meet in New Hampshire
420 miles away
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Jon has been a member of Good Dog for about 3 years
Jon was screened for responsible practices and has been a member since 2023.
Obsidian Giant Tibetan Mastiffs meets or exceeds our community standards in these areas:
Tibetan Mastiff
About Grim
Grim is a male Tibetan Mastiff. Carefully selected as a great representative of his breed, Jon decided to make him part of their program. Jon has passed Good Dog’s screening process, which involved a review of their breeding practices, environment, and the mental and physical health of their dogs.
Tibetan Mastiff
About Houtu
Houtu is a female Tibetan Mastiff. Carefully selected as a great representative of her breed, Jon decided to make her part of their program. Jon has passed Good Dog’s screening process, which involved a review of their breeding practices, environment, and the mental and physical health of their dogs.
Great level
Obsidian Giant Tibetan Mastiffs 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 Tibetan Mastiffs.
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.
Thyroid (Autoimmune Thyroiditis, registered with OFA)
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.