I am sorry I didn't check that thread earlier but happy to hear Molly is doing better.
Filou loves the Royal Canin kidney dry food- it's his favorite. Even Tigris who isn't sick devores it- and he would never touch any of the other diets.

Filou eats the RC kidney wet food as well- but he likes it not half as much as the other.

But I agree with you- at her stage it may be more important that Molly doesn't loose weight.

We keep fingers and paws crossed for her.