I have had Gigi on diet with Vet for over a year and did loose at first but she gained some back. She is very lazy cat. Seven years old and feeding her Purina OM perscription. I am thinking of changing it to Nutr Natural Choice weight management as it seems like a good product. Gigi is always trying to get other cats food as I think she hates hers. I feed both cats three times a day only, and watch so she doesn't get other's food. Any idea's?