There's another Corgi family suffering from the same diagnosis -- see this thread. Also, there's a wonderful online group called Addisons Dogs who can give you lots of good info and support. Good luck! It IS manageable -- Carolyn and Scooter can tell you all about it.
She is improving. Still drinking more than usual. Her appetite is great! We're having a storm right now so shes's kinda stressed. The day before she was diagnosed with AD, we had a thunder storm and she was trembling really bad. She's much more calm during this storm. I think her meds are working. I'm takine her back this week to check her lytes level. Hope it's good. Thanks for asking.
Addison's is insufficient adrenal steroids. It can certainly be life-threatening but is very manageable with daily oral medication or (usually better) monthly injections. May be costly to treat. If you have concerns, feel free to email me.