There is a park near me where I take Hunter for off-lead and recall training, there's a lot of dogs there and almost all are either friendly or not interested in him. However, 3 times now we've come across aggressive dogs off-lead. Curiously they have all been (different) huskies, which I have never thought of as an aggressive breed before. When a big dog runs at him Hunter tends to roll onto his back and the dog will back off. These huskies didn't though, even with their owners shouting at them to stop they just ignored them and continued growling/barking/jumping at Hunter. Twice I've picked him up until the owner has dragged them away but he's so heavy. If we try to walk a different way they just follow him.