Poor Storm! I didn't realize he was so ill. Prayers that you and your vet can find some small thing to perk him up for a bit. Glad he is still cuddling, though. Love is a good sign.
For Radar - my Oscar LOVES plain yogurt, even no-fat. The other two could care less. When you can, why not pick up a small container and see if he licks it off your finger?
If not, it's good on a baked potato...
HUGS and every good thought and PT prayer for your babies.