How Strong Is a Boerboel?
One of the most powerful dog breeds by mass and pulling strength, and one of the most exaggerated online. Here is the honest, sourced version: what kind of strength the Boerboel actually has, how it stacks up against other breeds, and why strength and bite force are two different questions.
The short answer
The Boerboel is one of the most physically powerful dog breeds, bred as a heavy South African farm guardian, with males typically 150 to 200+ pounds of dense muscle and bone.[1, 2] Its strength shows up as pulling power, carrying capacity, and grip rather than speed, and Boerboels have earned advanced weight-pull championship titles that prove it under judged conditions.[3] The heaviest pulls in the Unified Pulling Federation’s published results are Boerboels, at 22,039 lb on rails.[4]
Two honest caveats keep this page apart from the hype. First, strength has more than one measure: the Boerboel wins on mass and absolute pulling power, but lighter breeds can beat it pound-for-pound. Second, strength is not bite force, a separate and heavily mythologized topic where no Boerboel has ever actually been measured.[8]
What kind of strength is it?
A Boerboel’s strength is draft-and-guardian strength: low-geared pulling and pushing power from a heavy, well-muscled frame, not the sprint athleticism of lighter breeds. The breed standard describes a blocky, deep, muscular dog built to stand its ground and move weight, and that is what the body delivers.[1]
We see the two ends of that range inside our own kennel, which is a useful, honest illustration. Our stud Peterbuilt Hakeem is the athletic type: lean, fast, agile, high stamina. Our big male Marino is the other kind of strong: like a power lifter, very large and powerful, with less agility and stamina. Both are “strong,” but in different currencies, and a good breeding program knows which it is selecting for.
Proof under judged conditions: weight pull
The clearest objective evidence of Boerboel strength is competitive weight pull, a judged sport in which a harnessed dog draws a loaded cart a fixed distance. Boerboels hold UKC weight-pull championship titles, placing first in their weight classes at licensed events.[3] And the heaviest pulls in the Unified Pulling Federation’s published results belong to Boerboels: on May 9, 2026, two littermates each moved 22,039 lb on rails, one of them ColdRiver’s Mr. Wednesday, a son of our stud Peterbuilt Hakeem, at a body weight of 186 lb.[4]
We cover the sport, the surface caveats, and exactly what is verified versus kennel-reported on our dedicated Boerboel weight-pull page. The short version: pull numbers only mean something with their surface and sanctioning body attached, and we label ours accordingly.
Boerboel strength vs other breeds
Compared with other guardian and molosser breeds, the Boerboel wins on sheer mass and absolute pulling power, while more compact breeds often edge it on athleticism and pound-for-pound power-to-weight. Bully breeds like the American Pit Bull Terrier dominate pound-for-pound weight pull, while northern and mastiff-type giants hold the highest absolute weights, two genuinely different contests.[5] The table below is an editorial size-and-build comparison, not a measured strength test, because no such head-to-head test exists.
| Breed | Typical male weight | How its strength reads |
|---|---|---|
| Boerboel | ~150-200+ lb | Heaviest of the group; draft-and-guardian pulling power; earns UKC weight-pull titles. |
| English Mastiff | ~160-230 lb | Often heavier still; a giant-breed puller, less agile. |
| Cane Corso | ~99-110 lb | Lighter, but frequently rated more athletic and stronger pound-for-pound. |
| Rottweiler | ~95-135 lb | Compact, powerful, strong grip and drive; well below the Boerboel on mass. |
| American Pit Bull Terrier | ~35-65 lb | Dominates pound-for-pound weight pull despite far lower body mass. |
Weights are typical breed-standard ranges for males and vary by line and individual; the “how its strength reads” column is an editorial characterization, not a test result.[1, 7]
Strength is not bite force
A dog being strong does not mean it has a record-breaking bite. They are different systems, one is whole-body pulling and pushing power, the other is jaw-muscle force, and conflating them is where most of the internet goes wrong. No Boerboel bite force has ever been scientifically measured, and the viral “450 PSI / 850 PSI” numbers you see are invented, contradict each other, and use the wrong unit.
We take that topic apart, with sources, on our Boerboel bite-force page. If you came here looking for a bite-force PSI number, start there instead: the honest answer is more interesting than the fake one.[8]
Does breeding for a task make a dog stronger?
Selective breeding produces dramatic differences in size and build, but a 2025 study of 117 canid skulls across 40 breeds found that dogs are not anatomically specialized for their historic jobs; the shapes overlap far more than the breed labels suggest.[6] In plain terms: a guardian breed is powerful because it is large, heavy-boned, and well-muscled, not because it carries a unique “strength gene” other breeds lack.
That is a useful, responsible correction. It means a Boerboel’s strength is real and built into its size, but it is not magic, and it is no substitute for training, conditioning, and the everyday work of raising a large guardian dog well.
Boerboel Strength FAQ
How strong is a Boerboel?
The Boerboel is one of the most physically powerful dog breeds by mass, with males typically 150 to 200+ pounds of dense muscle and bone bred for farm guardian work. Its strength is pulling and carrying power rather than speed, and Boerboels have earned advanced UKC weight-pull championship titles that prove it under judged conditions.
Are Boerboels stronger than Cane Corsos, Pit Bulls, or Rottweilers?
By sheer mass and absolute pulling power, yes: the Boerboel is much heavier than a Cane Corso, Rottweiler, or Pit Bull. But strength has more than one measure. Pit bulls dominate pound-for-pound weight pull despite their size, and the more compact Cane Corso is often rated more athletic. Heaviest is not the same as strongest-for-its-weight.
Is the Boerboel the strongest dog breed?
It is among the most powerful by mass and absolute pulling strength, but 'strongest' depends on the measure. On raw pulling weight, giant molosser and northern breeds compete hard; on pound-for-pound ratio, bully breeds lead. There is no single head-to-head study that ranks dog breeds by strength, so treat any flat 'strongest breed' claim with caution.
How much weight can a Boerboel pull?
It depends far more on the pulling surface than the dog, so the honest answer always names the surface. The heaviest documented Boerboel pulls are 22,039 lb on rails, recorded on May 9, 2026 for two littermates: ColdRiver's Sun WuKong at 164 lb body weight and ColdRiver's Mr. Wednesday at 186 lb. Both figures are in the Unified Pulling Federation's published results.
Does the Boerboel have a special strength gene?
No. A 2025 study of 117 canid skulls across 40 breeds found dogs are not anatomically specialized for their historic jobs. A Boerboel is powerful because it is large, heavy-boned, and well-muscled, the product of selecting big guardian dogs, not because it carries a unique strength gene other breeds lack.
Sources & further reading
- [1] Official Standard of the Boerboel (size, blocky/muscular build; size defined by height, not weight). American Kennel Club. https://images.akc.org/pdf/breeds/standards/Boerboel.pdf
- [2] South African Boerboel Breed Standard (height; heavy, powerful guardian build). United Kennel Club. https://www.ukcdogs.com/south-african-boerboel
- [3] UKC official weight-pull results, Cascade American Pit Bull Terrier Club (Sept 2024): titled South African Boerboels placing first in class. United Kennel Club. https://www.ukcdogs.com/
- [4] Official results sheet, 'Spring Into Bully Max' weight pull, 5/9/26, Pittsburg PA, rails: Boerboels Wednesday (186 lb) and Sun Wukong (164 lb) each recorded at 22,039 lb. Unified Pulling Federation (UPF). https://unifiedweightpullfederation.com/assets/files/events/events_6a5b6241a0346.pdf
- [5] Whole Dog Journal: canine weight pull (pound-for-pound vs absolute; 'Banzai,' a 43-lb AmStaff, reported at 3,900 lb). Whole Dog Journal. https://www.whole-dog-journal.com/activities/weight-pulling/
- [6] Hebdon N. et al. (2025): dog breeds are not anatomically specialized for their historic tasks (117 canid skulls, 40 breeds). Science Advances 11(5):eadq9590. https://www.science.org/doi/10.1126/sciadv.adq9590
- [7] Boerboel vs Cane Corso and other breed comparisons (editorial size/build comparisons, not tests). A-Z Animals. https://a-z-animals.com/animals/dog-breed-comparisons/
- [8] The Boerboel's Bite Force: what the science actually says (companion page; strength is not bite force). Peterbuilt Boerboel. https://www.peterbuiltboerboel.com/the-boerboel-breed/bite-force
Last reviewed July 2026. Breed weights are typical standard ranges; strength comparisons are editorial characterizations, not measured tests, because no head-to-head breed strength test exists.
Power you can trace to the line
The Boerboel’s strength is only as good as the structure behind it. See how we breed for sound, powerful, health-tested dogs, and read the honest science next door.