question: addison's disease

[Nomilynn]

Hi,

My parent's dog Cody has for a long time had bad arthritis and kidney problems. He has to have IV fluids every night, and takes vitamins everyday. He has to be on special food because of his kidney problems.

The vet seems to think he might have addison's disease. I've looked up info on it online, but I don't know that I'm convinced. However, I'm not a vet. Has anyone had experience with this condition? Any help would be appreciated.

Here is a picture of Cody