Actually A/D is a high protein and a high fat food. The reason it says only 8.5% crude protein is because it is 78% water. You have to convert to a dry matter basis to compare it to other ferret foods. A/D is fine to feed to ferrets short term and even long term to help insulinoma ferrets. However for a ferret with chronic kidney failure, you do want a "low protein" diet to help prevent nausea and anorexia. Eukanuba has a multistage kidney diet for cats. I would suggest feeding that along with your regular ferret food. Unfortunately we do not have a ferret "Kidney Diet," nor do we know exactly what protein level would be low enough to help. The other problem is if the protein level is too low then we create other problems. Hope that helps, Jerry Murray, DVM [Posted in FML issue 3408]