Our 3 year old vizsla bitch was not enjoying her food. (Not a cheap make). She left a lot and her stools were quite loose making cleaning up after her unpleasant. We read online about Too much grain in a dogs food is not good for them and decided to try grain free. We had looked before but it was always very expensive. We tried Nourish (Mixing it in gradually with the old food) and have been very pleased. Our dog loves it and her Stools are so much firmer! If she leaves any food it is never the Nourish!?