Peterbuilt journal Field notes
A closer look at the dogs, the sport and the numbers. Explore independent, sourced coverage of canine weight pull, from the first pull to the published records.
The weight pull collection
Start with the sport, get to know the Boerboel story, or go straight to the result sheets.
The welfare questionCritics call it cruel, fans call it a sport. We read the actual rulebooks and the only peer-reviewed study of weight-pulling dogs, and found a sport with real guardrails and a real research gap.
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Reading the resultsThe 2026 IWPA Internationals published two championship sheets on the same day. Here is how to read the columns, why the figure under the percent heading is a body-weight multiple, and why the snow division ran on wheels.
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The Boerboel storyThe CR brothers' documented pulls, with most credit given to CR Boerboels. Sire Peterbuilt Hakeem and dam Black Iron Njombe are both part of their background. The results, rules and record qualifications.
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The records ledgerA maintained cross-federation ledger of single-dog weight-pull record claims, each graded by traceability. The heaviest documented pull is 22,039 lb on rails.
Read the articleThe essentialsA harnessed dog draws a loaded cart or sled 16 feet. Voice and gestures only, no touching. Here is how the sport actually works, who runs it, and why surface matters more than the dog.
Read the articleWe give CR Boerboels most of the credit for Sun WuKong and Mr. Wednesday’s success. Their reported sire Peterbuilt Hakeem and dam Black Iron Njombe both contribute to their background. Hakeem is part of the story; CR’s work with the dogs deserves the main recognition.
