try feeding a sick cat this –

Sick cats sometimes need a special diet. They also may have lost their appetite due to the illness they are suffering from. In this case, Bear has CKD (chronic kidney disease) and she has lost a lot of weight, typical for cats who have CKD. We tried many things to try to get her to eat.
This video from mykittycare you tube channel

I also supplement her diet with low salt turkey – which she loves.