I feel for you, it's so worrying when they don't eat properly and it is no comfort at all when a well meaning friend says "they'll eat when they're hungry"!
Dolly will eat pasta when it's been cooked with chicken and has absorbed the chicken flavour from the water. Is that something you could try with rice too?
Last night we had a real breakthrough, she had ignored and refused all food and water all day and at 11.30pm I was really worried. So I caved in and offered her a favourite treat which has dried chicken fillet wound around each end of a chewy stick like a dumbbell. She leapt on it, chomped away and as soon as she'd finished she went for a big drink then ate her meal and some extra kibble and biscuits!
Too early to say but maybe she needs to kick start her appetite like this. Anyway, I will try again at lunchtime.....