Horrible monsters. One literally ran at me from across the field a few months back, and if it wasn't for me being nimble and able to jump a wall, I would have been attacked. The thing was absolutely mental and the owner had no control.

If I was with my daughter at the time I dread to think what could have happened. Disgusting freaks of nature, those dogs are. Actually, not even nature. Man made freaks.

Edit: before anyone says otherwise, I'm a dog owner (collies my whole life, although I only have a westie right now). I know dogs, I have trained dogs. These XL things are dangerous and terrifying when they are poised to attack you. And when they do, you will not be able to fight back.