There are so many theories:
I have heard that it is best for cats if they get small portions during the day as this is their normal behavior when they feed on rodents etc.

F+T get food whenever they ask for it. That is usually an early breakfast ( a spoon wet food), a late breakfast (a spoon wet food), an early dinner (same) and a late dinner (same) plus dry food during the night, plus some treats before I go to bed to be delivered in my bed

Both are not overweight (F: 7,5 lb, Tigris 13,5 lb- but he is a big boy with long legs) and happy.

But I am sure there are other methods as well.

I know that I cannot resist to a cat asking for breakfast