Our rescue cat came to us overweight (6.7 kilos, target 5.5) and we struggled for three years with a variety of vetinary diets which had little effect other to ensure she was hungry and begging all the time. She then started to be sick when she was hungry. Our vet then suggested Purina OM which I started without much expectation of success. I am delighted to say, however, that it is having amazing results. She has two pouches and 25 grams of biscuits divided into several little meals and is completely satisfied until her next mealtime. She absolutely loves the wet food and licks the plate. Even better, in two months she has gone from 6.6 kilos to 6.25. Obviously still some way to go but this diet is so easy for us both that I have no doubt we will get there. Highly recommended.