It is best to go with the Vet RX food for cases like this, simply bc you CAN keep accurate control over her protein grams.
Home cooked is VERY tricky to monitoring how many grams she will actually be getting.
Hills l/d wet
or
ROYAL CANIN Veterinary Diet® canine HEPATIC LS™ 14 dry (which you can soften with distilled water)
Glad you joined the Yahoo Group
I don't think she is a lost cause, but you need to get her help
As Ellie May said above, she sounds sick and if you are near U of Tenn, I would head there ASAP