our breeding dogs
Get to know the Mastiffs who have been part of our journey — their personalities, their stories, and the special qualities that have helped shape Rockhill Mastiffs.
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Rainne
AKC/CKC Registered • 2 years old
Rainne is our current breeding prospect and a beautiful brindle with a calm, affectionate nature and impressive presence. She represents so much of what we value in an English Mastiff — wonderful temperament, sound structure, and that unmistakable Mastiff character we love.
Health & genetic testing
OFA Elbows - Completed/Clear, PennHIP - scheduled October 2026)
Cardiac & Eyes -Completed/Clear, DM - Completed/Clear • PRA-D - Completed/Clear • CMR1 -Completed/Clear • HU -Completed/Clear • Cystinuria III Completed/Clear • Long Coat Gene - Completed/Clear
Personality & temperament
Rainne is observant, thoughtful and quietly confident. She likes to take in her surroundings before jumping in, and once she’s comfortable, her affectionate side shines through. With her family, she’s a true shadow who is happiest close to the people she loves.
At home, Rainne is calm and easygoing. She’s gentle with children and other animals, naturally watchful, and seems to have an instinct for knowing when someone needs a little extra company. She doesn’t need to be the center of attention — she’s simply happiest being part of whatever her family is doing.
More of Rainne
Boden
Our Big Goofy Boy!
Boden is larger than life in every sense. He’s our big, goofy, affectionate boy with a personality all his own — and somehow, he’s managed to build quite a following of his own along the way.
But one of the things we’re most proud of is what an incredible dad he was to his puppies. Gentle, patient and endlessly tolerant, Boden genuinely loved being with them. He played with them, watched over them and seemed perfectly happy to have a pile of puppies climbing all over him.
Boden sired two of our previous litters, and seeing so much of his sweet, easygoing personality reflected in his puppies has been incredibly special. These days, his only job is being a much-loved member of our family — making us laugh, following us around and reminding us daily why we fell in love with Mastiffs in the first place.
And yes, he still has his own fan club. ❤️
Morgan
The One Who Started it All • Forever in Our Hearts
Morgan was the beginning of Rockhill Mastiffs. She was the dog who made us fall even more deeply in love with this breed and ultimately gave us the courage to raise our first litter.
Over three litters, Morgan brought 27 beautiful puppies into the world. She was an incredible mother — calm, devoted and patient — and watching her raise her puppies taught us so much about the kind of breeder we wanted to become.
But Morgan was so much more than the mother of our puppies. She was family. Her gentle nature, beautiful temperament and quiet presence left a mark on everyone who knew her, and pieces of her live on in the families who love her puppies today.
Morgan may have started Rockhill, but her legacy will always be part of its story. ❤️
A Blueprint for a
Healthy Life
Health testing is an important part of how we plan for the future of Rockhill Mastiffs. Dogs being considered for our breeding program undergo comprehensive health screening appropriate for the English Mastiff, including orthopedic, cardiac, eye and genetic testing.
We believe in transparency and make health testing and results available for the dogs in our breeding program.
PennHIP Hips & OFA Elbows
Comprehensive orthopedic evaluation
OFA Cardiac
Breed-appropriate cardiac screening
OFA Eyes
CAER Eye Examination
Genetic Testing
Breed-relevant DNA screening