My clown cat is totally well. The fever has not returned and he has been back to his old self for a few weeks now. We don't know why he got a kidney infection but it's gone now.
The oldest cat, bless his little old heart, hasn't gained any more weight but his intestinal tract is doing well on the Wellness Core food. It has no dairy, no grain and no soy. It has salmon, blueberries, yams and other stuff instead and he likes it so that's good. He has been constipated a few times but that is better than him having it the other way and not using the litter box. He has a second chance on life. How many more years he'll live, we dont' know and we don't know his exact age but he was middle aged when we got him 10 years ago.
The third cat has a charmed life with no health problems and so he doesn't get quite the attention the "sick" cats do.