Cool, I just checked the wiki. They're a mastiff-bulldog mix. Bred by white settlers in the 1800s to protect the farms. The mastiff part would be territorial and the pitbull would be fierce defense.
Yeah they're pretty purpose built and big
https://www.lusakatimes.com/2015/05/06/dogs-bites-private-parts-of-man-in-serenje/
> he does not know whether the dogs are vaccinated against rabbis
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