A Mastiff is significantly bigger than a Bullmastiff. While both breeds are large and imposing, the Mastiff consistently outweighs its Bullmastiff counterpart, often by a substantial margin.
Understanding the Size Difference
When comparing the size of these majestic breeds, weight is the primary differentiator. Mastiffs, often referred to simply as "Mastiffs" in breed discussions, are among the heaviest dog breeds. Males can reach an impressive weight of up to 240 pounds, with most males typically weighing between 170 and 200 pounds. Female Mastiffs are also substantial, capable of reaching 210 pounds, with an average weight ranging from 150 to 180 pounds.
In contrast, Bullmastiffs, while still large dogs, have a more moderate build. The breed standard for male Bullmastiffs sets their weight between 110 and 130 pounds, and females typically weigh between 100 and 120 pounds. This distinct difference in weight makes the Mastiff the considerably larger dog.
Weight Comparison Table
To highlight the size difference, here's a direct comparison of typical weight ranges for both breeds:
Breed | Gender | Typical Weight Range (pounds) | Maximum Weight (pounds) |
---|---|---|---|
Mastiff | Male | 170 – 200 | 240 |
Female | 150 – 180 | 210 | |
Bullmastiff | Male | 110 – 130 | - |
Female | 100 – 120 | - |
Note: Maximum weights for Bullmastiffs are not specified in the same detailed manner as Mastiffs within standard descriptions, but they generally fall within or just above their typical ranges.
Beyond Weight: Profile and Purpose
Beyond just weight, the overall profile and original purpose of these breeds also contribute to their distinct appearances. The Mastiff is a dog of immense mass and dignity, often described as possessing a "rectangular" body, conveying power and strength. Their historical role was primarily as guard dogs and protectors, requiring a large, intimidating presence.
The Bullmastiff, while also a powerful guardian, was originally bred in England as a gamekeeper's night dog, combining the Mastiff's size with the Bulldog's agility and tenacity. This lineage resulted in a slightly more compact and agile build relative to the pure Mastiff, designed for quickly tracking and pinning down poachers without causing severe injury. The Bullmastiff's profile is often described as more square and powerful for its size.
Key Takeaways for Dog Enthusiasts
- Size Champion: The Mastiff is the larger and heavier breed.
- Weight Ranges: Mastiffs can weigh up to 240 lbs (males) and 210 lbs (females), while Bullmastiffs typically range from 110-130 lbs (males) and 100-120 lbs (females).
- Historical Roles: Both were guard dogs, but with slightly different specializations influencing their build—Mastiffs for imposing presence, Bullmastiffs for agile apprehension.
- Physicality: Mastiffs generally have a more massive frame, while Bullmastiffs possess a powerful, athletic build for their size.
Understanding these differences is crucial for anyone considering adding one of these magnificent breeds to their family, as their size impacts everything from feeding costs and living space requirements to exercise needs and potential veterinary care for large breeds. For more detailed information on these and other dog breeds, the American Kennel Club is an excellent resource.