Can I ask what you feed her?
Until a week ago yesterday, she had been eating Purina Pro (?) with chicken and probiotics. We started her on that after she got really bad diarrhea about a year ago. It seemed to do well with her, and she liked it. I like dry food for their teeth, and ease of feeding. And less mess and cost.
Last Friday, after her check up and re-up on her vaccines, she didn't want her food. Ok, she didn't feel so hot after all the shots. Friday afternoon, the vet calls with the information about her having low protein, and as well as a suspicion of Addison's.
Over last weekend, we mixed some canned food with the dry, but she wasn't really hungry. Last Sunday night, she had BAD, clear the room, gas! (At least it was warm enough to open the window!

) Monday she went for the Addison's test. No breakfast given, per vet. Some more chemicals, a test, and home. That's when the diarrhea started.
Several of these things listed diarrhea as a side effect, but Tuesday, I was worried enough to call the vet, and they could see her right then. Two more pills: An anti diarrhea, and a probiotic.
Still going with the canned food mixed with a few dry crunchies... not much interest, but eating some. The diarrhea slowly cleared up, and yesterday, DH said she had a solid poop on her morning walk. It was a little soft later in the day.
Sooo... TMI, but she's been eating a little dry food, some canned (Purina and Blue Buffalo), some canned pumpkin, a few spoonfuls of yogurt, and today, boiled chicken and rice.
She is positive for Lyme Disease; she may had it when we adopted her 3 years ago. She'll 11 now.
Any input from anyone is welcome. Last night I was really scared; I thought we were losing her.