American Mastiff

Dog breed profile

The American Mastiff is a large, powerful breed developed in the United States by blending English Mastiff and Bullmastiff traits. It is recognized for its calm and gentle nature combined with protective instincts, making it a devoted family companion. This breed requires moderate exercise and enjoys a routine that balances physical activity with rest. Grooming needs are relatively low, with regular brushing to manage shedding.

Due to its size and guarding tendencies, the American Mastiff benefits from early socialization and consistent, positive training methods. It is best suited for experienced owners who have enough space and time to devote to its care. While friendly with children, it may be reserved around strangers and other pets, so supervision and gradual introductions are recommended.

Overall, the American Mastiff offers a blend of loyalty, strength, and calmness, making it a rewarding companion for those prepared to meet its needs.

Temperament & Traits

Common Traits

loyal protective calm gentle intelligent
Energy Level 3/5
Trainability 3/5
Vocal / Barking 3/5

Health & Care

Common Health Issues

  • hip dysplasia
  • elbow dysplasia
  • bloat (gastric torsion)
  • heart conditions

Grooming Needs

Weekly brushing to manage shedding and occasional baths to keep the coat clean.

Exercise Needs

Moderate daily exercise including walks and some playtime to maintain fitness and mental stimulation.

Health Notes

Regular veterinary checkups and health screenings are important for early detection of common large-breed issues. Maintaining a healthy weight and monitoring diet can help support overall well-being.

Is a American Mastiff Right for You?

Best suited for experienced dog owners or families with space and time to provide proper care and training. Not ideal for small apartments or first-time owners.

Space & Home Environment

Best in a home with a fenced yard and enough space to move comfortably.

Available Puppies For Sale

View all available American Mastiff puppies →

We’re working with breeders to list available American Mastiff puppies. Check back soon or reach out to breeders above to ask about waitlists and upcoming litters.