Addison's can be tested for and is treatable but is very expensive (at least in the states) for the medications. It is like diabetes. You take the meds and you are ok. Refer to the links Phred suggested to understand more about the disease. Pup shouldn't have to get daily IV fluids though if it is Addisons and the pup starts the meds.

If I get more info I will post it. We are still learning about the disease in detail ourselves since Blaze is the first dog I have met that has the possibility to have it. I still haven't heard for sure what the diagnoses is since Kathi and Bob are on a Cruise. She was suppose to email me but I guess she must be having a hard time from the ship!