My Sammie barks a lot also. She barks out the window if she senses or sees anyone. She's very protective of the house and the grounds around it (we live in a townhouse development). Has your dog been socialized? Sammie is much better now since I've taken her to doggie daycare. I'm not too worried about her barking, she is a dog for goodness-sake and that's what dogs do...it would be like telling humans to stop talking.

I've also read that you can teach your dog to bark on command and that may minimize the barking. Anyway, good luck with your doggie!!!!