First, thank you everybody for every prayer, thought, well wish, good vibe, hug & piece of advice.
Lvoss, I followed your link & read up on this disease. About half of the symptoms seemed to be a good match, the other half not. I brought it up with the doctor today, and she said this tick disease causes nose bleeds because the dog's blood can not clot. Booger isn't having nose bleeds, its drops of blood in his sneezes due to dried out nasal passages from sneezing so much.
I mentioned the thyroid issue, and she doesn't think its thyroid related.
She is most concerned now with just how miserable he is. The sneezing is one thing, the 24 hour sleeping & being too lethargic to greet us when we come home is very worrying to her. Although she originally did not want to do a blood panel because she didn't think it would reveal anything, she now wants to do a full blood panel to see if it reveals something.
We are scheduled to go in tomorrow evening at 7 to get blood drawn, and hopefully will know something sometime this weekend.
As far as getting a second opinion… the first vet recommended benadryl. I spoke with another vet over the phone & listed his symptoms. This vet pretty much concurred with Dr. DeHaven... probably not thyroid or tick disease. She also recommended going to an internal medicine specialist.
I will continue to update.