


I'm Holly M., the breeder behind North Star Mastiffs located in Cochranville, PA. As breeders, we are stewards of the future of our breed, so we are careful to always maintain ethical breeding practices. This includes proper health testing, intentional breeding for specific traits, and raising our puppies with proper socialization.
Where do your breeding dogs live?
These dogs are already reserved or have gone home.

Boy 1
Male

Boy 2
Male
Holly 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.

Holly 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 Holly 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 Holly 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 Holly.
Meet in Cochranville, PA
101 miles away
·
Holly has been a member of Good Dog for over 2 years
Holly was screened for responsible practices and has been a member since 2023.
North Star Mastiffs meets or exceeds our community standards in these areas:

Mastiff
About Harper
Harper is super easy going, a wonderful companion, and a gentle mom. She enjoys her life in the farm, going to “work” with the horses each morning, and hanging out with her family. She shows in conformation classes too!

Mastiff
About Harper
Harper is a female Mastiff. Carefully selected as a great representative of her breed, Holly decided to make her part of their program. Holly 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.
Excellent level
North Star 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 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.
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.
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).