I have only one cat on dry food (prescription) She eats 1/2 cup a day fed thus:
Breakfast: 1/16th cup, 15 minutes later another 1/16th cup.
An hour later 1/16th cup.
mid day snack 1/16th cup
Supper 1/16th cup, 15 minutes later 1/16th cup.
An hour later 1/16th cup.
bedtime snack 1/16th cup.