Have Cat Questions? Ask a Cat Vet Online.
You have a big problem here and you need to find a vet immediately.
Cats who don't eat can quickly get sick and die.
It is called hepatic lipidosis and it is where the liver thinks it is being starved and starts "grabbing" fat cells...and actually ends up killing the liver. Without a functioning liver, the cat has little chance of survival.
You need to find a vet today and get treatment for the cat.
Let me know if you have more questions.
If you seek vet care right away, it could be very treatable. I suggest that you do so right away.