Hey, guys...thanks SO SO much for your replies. I would have to plead guilty to spoiling her...I know that could contribute to the problem...she definitely knows she has to listen to me, and there's no problems getting her to come when she's called or sit or stay or anything, but she is still a spoiled pup.

Also, I used to make a big deal out of coming and going since I first got her, (I had other dogs who did big greetings their whole life and it was never a problem, so I guess I was in the habit) it wasn't a problem for the first couple of years, but since she's started showing signs of SA, I have really stopped that. I unemotionally tell her "bye Luna", and I leave, and when I come back, I ignore her until she is calm, and when I do acknowledge her I stay calm and quiet and just give her a gentle pat. I'll definitely keep doing that, and I'm off to buy her a kong and some good treats today. She doesn't eat while I'm gone, so I'm not sure it will work, but it's worth a try.

Thanks again!