My sisters parents have two dachshunds. One is VERY, VERY aggressive. However, it is due to them (the PARENTS, not the kids) antagonizing the poor dog into it all. If you even LOOK at this dog, and he perceives it wrong, he will run at you, snapping, growling, barking, etc. The other one is protective over food and will attack you if you try to bathe him. He won't attack you for looking at him, though.