This product is very efficient in loosing cats' weight and is gentle on their stomach. We have 3 cats who have stomach problems and 2 of them need to lose weight. Because of that, we were getting a prescription food from a vet, and it was working, cats' stomach issues were solved and stopped gaining weight. But the vet stopped providing the food. So, we tried many different off-the-shelf brands. So far this product has the best results of all and the same results as the prescription food we were getting. None of the other off-the-shelf cat foods we tried solve the stomach problems completely, and/or cats were very hungry while they were still gaining weight. Now, my cats are happy, and we are happy!
Finally found it!! For the first time she goes to the food first and the Greenies second and doesn't always guzzle them down. She's losing weight and has more energy (and isn't so cranky). She's a love again. So today we're going back to PetSmart to find her a roommate---and get another bag of food. The new cat/kitty will start on Nutro Natural too. A big plus is the store is only about 5 miles from my home.