Well, we've always ignored this behavior, but at the same time, I would stop whatever is scaring him, or put it away. I'm always afraid that people are going to think that we beat our dog with things, and that is why he is scared of everything! He's not timid or scared of us by any means, he's very very loving towards us, but if I come home with a bag in my hand, his fur stands on end (like a cat), he puffs up, and he starts barking like crazy! I have tried rewarding him and it doesn't faze him one bit...I've even tried setting the item down on the ground to let him smell it and get use to it, and sometimes he gets use to it, but as soon as I pick it up again, he goes NUTS! It's the strangest behavior I've ever had to deal with...it doesn't cause a problem at home, but out in public, if someone approches him with something in their hands, he scares them...and nips at them. We can't take him into Pets Mart anymore because he was barking and nipping at people who were pushing carts! I want to expose him to the public more, but I don't know how I can with him scaring everyone...Do you think he may have some sort of anxiety or something else that would be causing this?