Q. My dog has Addison's Disease and is panting alot, is this normal?
DR. CHRISTIE LONG, D.V.M., C.V.A.
A. I don't typically associate panting with Addison's disease. I do see panting (it's a primary symptom) of the disease that's the opposite of Addison's disease, which is Cushing's disease. Cushing's disease involves having an overactive adrenal gland, as opposed to a non-active or under active adrenal gland. Panting can also happen with steroid administration. If you've upped the dose of prednisone that your dog normally takes to combat holiday stress that may be the cause of the panting.
Panting can be a sign of stress, so evaluate the environment and see if there's something that could have your dog agitated - fireworks, small children visiting, etc. This is especially important with an addisonian dog, as I'm sure you know.
Other causes of panting could include primary respiratory problems or heart disease, since low oxygen states can trigger panting. Definitely mention this to your vet (a phone call isn't a bad idea) for this reason, just to see if he' like to examine your dog to make sure everything's OK>