


I'm Mackenzie G., the breeder behind Jems Haven located in Idaho. Matching each family with the right puppy is the key to our success and yours. We are honored to bring another member of the family into your life!


Mackenzie 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.

Mackenzie 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 Mackenzie 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 Mackenzie directly.
You can drive or fly to pick up your puppy from Mackenzie.
Meet in Idaho
5095 miles away
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Mackenzie has been a member of Good Dog for over 3 years
Mackenzie was screened for responsible practices and has been a member since 2022.
Mackenzie’s links

Jems Haven meets or exceeds our community standards in these areas:
Good level
Jems Haven 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 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.