Likely, most of that is from the wet food. If our dogs' digestive tracts get very irritated, we often will put them on a canned food that's supposed to settle their tummies. They rarely drink when they're eating it and because it's very low residue and they've usually been vomiting and/or have diarrhea for a few days, there's very little stool till we start transitioning them back to kibble. So the not drinking and pooping parts are probably normal for her circumstance.
Not sure what the urine dribble would be from, though.
Have you talked to the vet again about possibly giving her more food? If she's so hungry, she may be ready to handle more.
When are the results from the blood work due back?
"We are--each of us--dying; it's how we live in the meantime that makes the difference."
"It's not what you gather, but what you scatter that tells what kind of life you have lived!"
"Be kinder than necessary, for everyone you meet is fighting some kind of battle."