I trust Duncan literally with my life!! He woud never let anyone hurt me or for that matter, even come near me!! He's VERY VERY over protective!! Which is why I DON'T trust him with other people. I really dont' think he can be trusted 100% with anyone but me which makes me sad. He is very good with my nieces and all children actually. But he dislikes random people and has snarled and growled at a few of them. He won't even let my mom or dad hug me without getting upset and either jumping or barking. And if I'm sleeping....BOY, you better not even think about coming in the room or within 10 feet of me. he keeps "guard" and puts himself between me and the door or the person and will bite anyone who comes near. I worry about him. And I worry that if there was a fire or something, he would be hard to save. Silly to worry about but I do. We're in training so that he is not quite so protective and aggressive with others. I dont' want him hurt someone and have to go to "jail"