Have you tried Delectable Lickables in the stew flavors? my cats have survived weeks on only a few licks a day of this, they have leukemia and can totally stop eating.
Do a search here for Cerenia. I think you will see quite a few posts relating to it and lack of appetite.Furrypurry - I will tell you my vets said the most important medication to provide is prednisolone over everything else. It's really important to control inflammation. I think I might have to stop the cerenia if it really does suppress the appetite but it's supposed to increase appetite. Weird. I also think it's good to syringe-feed water during the day and provide the sub-Q at night since the cat cannot drink while it's asleep and you cannot provide water while asleep either.