Some breeds are also more likely than others to exhibit aggressive behaviour, with Rough Collies, like Lassie, the most aggressive of all breeds.
In contrast, Labradors and Golden Retrievers, beloved for their docile temperament and gentle nature, were found by scientists to be the least aggressive breeds.
*****
For all the trouble I had with that asshole dog Jack when I first got him, he's actually fairly docile, especially around me and Lisa. He's territorial with strangers for sure but not overly aggressive - he'll stand his ground but won't attack.