Deer Creek Mastiffs

Deer Creek Mastiffs is a breeder of Boston terriers and mastiffs in New Park, Pennsylvania, serving York County and South Central Pennsylvania near Harrisburg. Katie Holmes has bred dogs for more than a decade and holds membership in national breed clubs, performing health testing for common issues. Pups are raised in a family home with daily socialization and gentle handling to support well-adjusted temperaments.

Adults enjoy indoor living with supervised outdoor time on spacious grounds, promoting physical health and safe exploration. Deer Creek Mastiffs emphasizes temperament in breeding selections, and many dogs have gone on to therapy work and loving family homes. Reviewers often note the breeder’s attentive communication and genuine care for each animal’s well-being. Each puppy leaves for its new home after completing vaccinations and a thorough veterinary check. Deer Creek Mastiffs selects breeding stock based on health screenings and gentle temperaments to support longevity.