So if you want a healthy dry food, just make sure that the grains are kept down. These types of basically the leftovers of animal and vegetable pills.
Canned foods are often healthier and simpler for a kitten to digest.

Answer - It depends on how advanced the disease is, what treatment has brought place up til now, how healthy your cat was before, how old you cat is and many others.
Another issue is the shortage of the amino acid 'taurine' will be vital building block for proteins in ingest at least.