I am curious about the Natural Gold kibble, especially since it seems to have a lot of herbal additives. However, the high protein count concerns me. Anyone have any info on if this might affect the older ferret's kidneys? I know that high protein can affect dogs and cats as they age, and having older ferrets I do worry. Anyone have any experience with this or know any info on it? Blessings, Margie [Posted in FML issue 5223]