Doctor said -600 grams. Time for a diet!!

Working on trying to dechonk one of my cats. I already have a PetLibro automatic feeder, but can only do 2 servings because it dispenses way too much. I want to be able to do 4 very small servings throughout the day.

Has anyone found a way to make it do less? It’s already on the smallest portion but it’s still too much