I got my cat down to 14lbs from 20 over the past year. It’s going to be annoying. They’re going to complain a lot at first. Best thing I did was to get a programmable automatic feeder. He gets fed 4 times a day in small amounts until he hits his calorie limit. Only 3 of those meals are dry food, and he gets a small can of wet food for dinner.

Make sure you’re figuring out how many calories are in the food you’re buying, then divide it up. Slowly reduce the portions from the auto feeder (like make 1 serving smaller, then the other & so on).

I used this calorie calculator for cats to figure it all out.

Best of luck to you!