t know comes to the door, or she hears a loud noise, or whatever it is that makes her shake. Whenever you find yourself
in one of these situations, talk to her
in a very upbeat voice. Always appear happy. DON'T tell her "Awwww, it's OK! You're OK!" in a soothing voice, because all that does is reinforce the negative behavior she's exhibiting, and instead of learning to behave differently and calming down, she will only continue to do the behavior and get worse.