Please Help! What is wrong with my cat?

She has jaundice, is very week, lethargic, and dehydrated. We took her to the vet but they couldn't tell us what was wrong. She tested negative for FIV and . The vet asked us if we want to put her to sleep because we can't afford the emergency care/tests she needs done to possibly get better. We don't want to put her to sleep. Please help.

[Canuckchick]

I would suggest calling around to see if you can find a vet who will accept installment payments for treatment. I have no idea what's wrong with your cat but if she remains dehydrated she wont last long. If you really can't afford the treatment or can't find a vet who's willing to accept payments then it might be in her best interest to euthanize. But please try and get a second opinion 1st. You can also check your local shelter as their vets often work cheaper.