The American Temperament Test Society tests aggression in dog breeds in controlled environment. Participants self select, so there’s that, and ultimately I think the test says more about the owners than the dogs. Nonetheless, per the ATTS , the american pit bill terrier passed 87% of the time while the Australian shepherd only passed 83% of the time.

Do you hate money but love backpacks? Then check out Hillpeople Gear. I have a Connor, but Umlindi might be up your alley. They’re not light backpacks, but they’re sturdy and the load bearing system is second to none. Super comfortable even without a hip belt.

Also check out Mystery Ranch. If you can find a used one that’s be best, but even after getting bought by Yeti they still make really good shit.