What do I do now?

« We know what he DOESN’T have, says the vet after blood tests, glycolic test, x-rays etc and hundreds of dollars. But we don’t know what he has.”
Great.

Pasha has been at the clinic for two days and will spend another night. He’s had an IV the whole time. He seems better and more awake... but he still throws up and still doesn’t eat.

If tomorrow is more of the same... what do we do? If we take him home and he doesn’t eat, he’ll weaken until he dies. But we can’t leave him at the clinic, in a cage, with a needle up his paw for days on end either...

So at this stage, I don’t know what to do.