[Archie's Mom]

I agree with the others that you have Simon's hacking checked -- it may be something medical. As far as Hallie's fright is concerned -- I'm not a dog behaviorist -- but what about when this happens picking both your babies up and holding them together on your lap -- showing Hallie that her brother is OK and letting her check him out? That way, maybe Simon will actually reasure her. I dunno -- it's worth a try. You may also mention to yout vet Hallie's reaction. Good luck with them both!