Welcome to Black Velvet Greater Swiss Mountain Dogs.
We are an experienced “all about dogs” home, both personally and professionally. Mac is a dog trainer, and Gaby is a veterinarian and long time breeder of Newfoundland Dogs. At the moment, we share our home with eight Greater Swiss Mountain Dogs, 5 girls and 3 boys.
This site is dedicated to our Swiss Mountain Dog breeding program, as more than a decade long dream continues to unfold with Billie Jean’s second litter: Thelma & Louise.
Within these pages we hope you will enjoy learning about the Greater Swiss Mountain Dog, and come away with a sense of who we are as passionate educators, breeders and lovers of the Swissy.
Please stay up to date with the happenings of Thelma & Louise by following us on Instagram @sfpuppyprep, or by visiting our News section.
For information about our puppy socialization and training programs in San Francisco, please visit OutdoorEducationSF and SF Puppy Prep.


With their people, they are loyal, affectionate and fun. At home, they want to be on something soft, and usually, the closer to you the better! After sufficient exercise and stimulation, they make fantastic couch buddies for a movie, and are quite happy to warm your bed with you at night if it suits your lifestyle.