First, the feeding.

The ones who get the same food should be in the same room, with the door closed. This will stop you chasing cats between dishes. So Syd and Bob eat in one room; Poppy Elmer and Sparkler eat in one room. I put them in their rooms and close the doors FIRST, as I find it too hard to maneuver them when I have the full dishes in my hands. So, um, Bob and Syd in the bedroom, the 2 old ladies in the bathroom, and the other 3 in the kitchen. Do you think this will work?

Now, the food. My RB Mr. Amber Cat refused the prescription food from the get go. So he never had it.

Cats (and humans) w/ kidney disease need a low protein food, and a moist, high water content food. You can try adding some chicken broth to the prescription food, shouldn't need too much to tempt them.

Other good add ins: tuna water from the can, salmon water from the can (so if you are having tuna or salmon, save the water for them). A bit of cottage cheese mixed in can be quite tempting. The oil from olives

As for started cans, cats do not like cold food. You can try taking the can out of the fridge in the morning so it is room temp when you feed them, or if the food bowls are microwaveable, try nuking it for 20 seconds and stirring it around before you feed them.

Hope this helps! And I'll be interested in any ideas others have, too.