Marcy Mountain Mastiffs

Marcy Mountain Mastiffs is a mastiff breeder in Lake Havasu City, AZ, in Mohave County and western Arizona near Las Vegas. Owner Doreen Dysert supports breed health through regular health screenings and adheres to standards set by national canine organizations including the American Kennel Club.

Puppies spend their early weeks in a family setting with daily socialization, interaction with visiting children and pets, and exposure to household routines. Adults enjoy indoor living alongside their human companions and daily outings by the Colorado River for gentle exercise. The breeder aims to produce well-tempered dogs suitable for both companionship and performance activities. Facilities include air-conditioned indoor kennels and secure outdoor runs shaded from desert heat. Each puppy follows a nutrition plan based on high-quality proteins and gradual transition to solid food.