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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.
I have Tidal. It costs the same as Spotify but pays artists more and actively promotes up and coming musicians. Also they aren’t part of the military industrial complex, so that’s cool.