Please put Gretchen on your prayer or good thoughts list.

One thing you could consider would be contacting a holistic vet or an accupuncturist that works with animals. You might not be able to solve the problem, but nutritional or accu approaches can many times mitigate allergic/auto-immune issues.

If you could dial things back a little, perhaps she could be on a lower dose, or feel better on the dose she's on.