Luck, Please

Callie has to go to the vet this morning. She's lost a lot of weight and is very bony. She eats quite a lot, even forcing Miss Luna out of the way, which she never used to do, but has lost weight, not gained. I have a feeling the problem is one of two things: diabetes, or kidney failure. Please, please, please let it be something we can easily deal with, or no problem at all. Please, please, please.....