Mastiff (English Mastiff) vs Saint Bernard: Which Suits Your Home?

Two giants, closely matched: Mastiff at 120-250 lbs and 27-32 inches, Saint Bernard at 120-180 lbs and 26-30 inches. The Mastiff's upper weight range runs higher, but a large Saint Bernard and a modest Mastiff could easily land at the same number on a scale. Both need real space, sturdy furniture, and a car big enough to transport them comfortably -- size isn't the category that separates these two.

Both tie here too, low (2/5) exercise need and low (2/5) energy level across the board. Neither breed wants to run distance or play fetch for an hour; both are content with modest daily activity and a lot of resting in between. If exercise commitment is a concern, this comparison offers no help -- pick based on the categories where they actually differ.

The Saint Bernard asks more of you here -- moderate (3/5) grooming against the Mastiff's low (2/5), and high (4/5) shedding against the Mastiff's moderate (3/5), largely thanks to a double coat that can run long-haired depending on the individual dog. The Mastiff's short, dense coat is genuinely lower-maintenance on both counts. If shedding volume matters to your household, that edge goes to the Mastiff.

Neither breed suits an apartment, and the Saint Bernard actually rates worse -- very low (1/5) against the Mastiff's already-low (2/5). Barking follows the same pattern: Mastiff at very low (1/5), Saint Bernard at low (2/5). Both are quiet by nature, so noise complaints are unlikely with either, but space is the real constraint and the Saint Bernard needs even more of it.

Trainability ties at a moderate (3/5) for both breeds. First-time-owner suitability splits slightly in the Saint Bernard's favor, moderate (3/5) against the Mastiff's low (2/5) -- a small gap, but real. Neither breed is a natural pick for someone brand new to dogs; both are large, independent-minded, and benefit from an owner who's handled a big dog before.

Both tie at very high (5/5) with kids, so that category is a wash. The Saint Bernard pulls ahead with other dogs, high (4/5) against the Mastiff's moderate (3/5), and with strangers, high (4/5) against moderate (3/5) -- consistent with its reputation as an especially outgoing giant breed. If you host often or keep multiple dogs, the Saint Bernard's data suggests an easier social fit.

The Mastiff has a lifespan edge, 9-11 years against the Saint Bernard's 8-10 -- giant breeds generally run short, and the Saint Bernard runs shortest of the two. Health lists overlap heavily: hip dysplasia, elbow dysplasia, and bloat/GDV appear on both, plus DCM shows up on both lists too. The Saint Bernard adds entropion; the Mastiff's list is longer overall, adding cancer, arthritis, and PRA.

Both breeds rate very high (5/5) on overall cost, and the dollar figures land close together -- Mastiff at $150-350 monthly and $2,200-4,500 for year one, Saint Bernard at $150-310 and $2,200-4,200. There's no real cost advantage to choosing one giant breed over the other; budget the same either way, and expect vet, food, and insurance costs that scale with size, not breed identity.