What do I feed my cat with kidney disease?

HELP!! My cat Doodle has CRF and has not ate anything in 2 days. Yesterday he vomited 3 times and today he vomited four. I called the vet to see about some nausea medicine and I'm just not sure if he will be able to keep it down. I have tried everything. He has no appetite and barely drinking and water. Yes, he is on pred. and fluids and all that other stuff but he stopped eating his canned food. Does anyone recommend baby food? What kind?