Okay. Then that makes my thought unlikely, but I'll still mention it. Has anyone mentioned Addison's? It's called "the great pretender" and I lost my elderly Ed to Addisonian crisis. His heart was abnormally small/almost shriveled on the x-ray and he'd been limping on and off. There were a lot of things that just seemed to be vague or related to age and he was atypical for Addison's, which is why nobody thought of it. I believe his globulin levels were low rather than high, however. My current vet has a sign on his wall that says, "Is it Addison's" because it's missed so often. I just thought I'd toss it out there because if they present in crisis, you really have to be on top of it to save them. We missed it. I'd rather you ask and it be a solid, "That's ridiculous!" than to not mention it.