we have had problems with our dogs rushing the door when people knock, but we've now found a solution! we got a new door bell (that was like $30 at lowes, it's wireless too!) that has different door bell options, some odd around 60 of them. one is a bird chirping. it's different, and the dogs hear birds all the time, and they have STOPPED rushing the door completely! their anxiety over people at the door is gone. completely! our pizza man even looked at hubby funny because he shut the door fast, because the dogs didn't even bother looking up, i guess they figured brandon was taking a cigarette break! the guy was very relieved when he realized why hubby did it! just thought i'd share!