Posted : 7/23/2015 10:35:42 AM
Leah -- absolutely the very first stop **must** be the vet. And I would suggest because she's a purebred that you have your vet send a thyroid panel to either Hemopet.org or to Michigan State Vet School (far far more accurate than sending it to a local lab. A bit more expensive but the breed-specific answer and the more accurate answer are what you need).
She almost sounds hyper (too high) thyroid but you can't just assume that and hyper thyroid wouldn't be typical BUT it is possible and it's more dangerous than hypo thyroid (low).
In order to defuse something like this (it's like a form of separation anxiety) you likely will need to do some serious desensitizing and there are others on here who are a better trainer than I am. BUT you **must** start with the full physical exam first. I'd ask the vet to also do a full blood chemistry on her at the same time so you have not just a CBC (complete blood count) but you want all the liver, kidney values etc. so you can rule out anything physical and THEN you can attack the behavior/training.
The thyroid can give some odd signals sometime. You may want to read "The Canine Thyroid Epidemic" by W. Jean Dodds, DVM (you can get it on Amazon and I promise it's an interesting read -- maybe not to read it cover to cover but the info is amazingly helpful).
Blood for a thyroid test does *not* have to go overnight. Priority Mail is FINE. There are complete instructions on how to prep the blood to send for your vet on the Hemopet.org website.