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I have a Jack Russell Terrier who has just turned 2. She has always been excitable when people come to the door and as we have a lot of little children in the family we have been training her to sit when some knocks and then walking to her bed. It's hard work but I'm sure we'll get there eventually! My concern is that since we have started to do this when someone knocks she is incredibly jumpy the rest of the time. She constantly barks at the slightest noise outside and if she is unable to see out of the window she runs to the front door and slams against it. I'm wondering if there is anything we can do to calm down her incessant barking?!?!