The dachshund bark should alert any invaders that their case is hopeless. My friend Susie (injured in January, almost back to herself now, but weak on the left side, kind of like a stroke) has a min pin at her house now. It is a step down from the 75-lb Labrador retriever (who now lives at my house), but this 13-lb dynamo has a piercing little bark that echoes at the door - alerting all to his size, but that doesn't work against him because it also conveys his passion for defending his house. I'm sure it is similar with your pooch.